WO2013004763A1

WO2013004763A1 - Assembly comprising a woven sleeve and hardening material for fastening an anchoring element in a drilled hole

Info

Publication number: WO2013004763A1
Application number: PCT/EP2012/063064
Authority: WO
Inventors: Frans Setiabudi
Original assignee: Smp Swiss Macro Polymers Ag
Priority date: 2011-07-05
Filing date: 2012-07-04
Publication date: 2013-01-10
Also published as: DE102011078696A1

Abstract

Method for anchoring an anchoring element (106) in a drilled hole (300), wherein the method has the following: a) introduction of a woven sleeve (102) into the drilled hole (300); b) filling of a hardenable hardening material (104) into the drilled hole (300) and/or into the woven sleeve (102), with the result that the latter are/is filled at least partially with the hardenable hardening material (104); c) insertion of the anchoring element (106) into the woven sleeve (102) and into the drilled hole (300); d) hardening of the hardenable hardening material (104) in the drilled hole (300), with the result that the anchoring element (106) is anchored in the drilled hole (300); wherein the woven sleeve (102) is configured to be permeable for the hardenable hardening material (104).

Description

Assembly of fabric sleeve and curing material for securing an anchoring element in a borehole

The invention relates to a method for anchoring a

Anchoring element in a borehole, an arrangement for

Anchoring an anchoring element in a borehole, a

Use and a mounting arrangement.

A mechanical anchor is a component that is used to fasten a screw or other object in a wall, ceiling, floor or other area. Such a dowel is usually a rigid one

Plastic part that expands when inserting an object to accomplish attachment of the object.

In a chemical fastening system, a hardenable hardening material (for example epoxy resin) is introduced into a borehole, an anchoring element is picked up by the hardening material and the curable hardening material is hardened. This leads to a non-positive or positive connection between anchoring element and Aushärtmaterial and a chemical bond between

Aushärtmaterial and the wall in which the borehole is formed.

However, it may happen under undesirable circumstances that the holding force of such an anchoring element in the

Aushärtmaterial or between Aushärtmaterial and wall is not large enough. This can lead to a failure of the connection.

DE 3800833 discloses a composite dowel with a

Screw channel for receiving a fastening screw, with a spreadable by screwing in the fastening screw expansion area and with provided in the shaft outlet openings for in the

Composite anchors injected composite mortar, wherein in the screw channel leading to the outlet openings guide surfaces are provided, which divide the screw channel in a front and a rear region, and wherein the outlet openings pass in the outside of the composite dowel extending longitudinal grooves. DE 19639604 discloses one with a fabric stocking

coated composite plastic anchors with arranged on its outer surface blocking means and a screw channel for receiving a fastening screw, and a shaft with outlet openings for in the composite dowel by means of a nozzle having

Spraying device injectable composite mortar, wherein the

Outlet openings in tearable, on the outer surface of the dowel longitudinally extending longitudinal grooves open, said

Screw channel at least over a portion of its length in adaptation to the nozzle of the injection device tapers conically and closed at the insertion-side front end of the anchor by a spray skin, and wherein in the screw channel as

Einschiebbegrenzung for the nozzle serving stop is arranged. The composite dowel has a dowel shaft enclosing tissue, which is stretchable and closely meshed. When injecting the composite mortar, the fabric deviates outwards, and due to the narrow meshes, the composite mortar is held between the fabric and the dowel shaft. If the dowel is inserted in a honeycomb or in a hole with lateral bulges, the tissue forms

corresponding to the injected composite mortar

Bumps, which after curing a positive

Make connection between composite dowel and masonry.

DE 38 15 551 AI discloses an axially elongated, preformed tube having a front end and a rear end. The tube is plugged at its front end and at its rear end for the

Introduction of a binder or adhesive material and a punch for extruding the binder or adhesive material open. Optionally, the tube is subdivided along its length into a plurality of porous axial sections, each section having a porosity different from that of its adjacent section, so that a selected one Distribution of the binder or adhesive material in selected areas is made possible. The punch is a bevelled or tapered, in particular conical, pin or rod.

DE 29 26 155 AI discloses a compound of a component with a surrounding soil or rock and a method for producing such a compound. The component is sheathed with a flexible, optionally fluid-permeable, bag-like tissue stocking, the free end of which is connected tightly to the component. The component is introduced into the borehole with the tissue stocking, and by means of a tube system, flowable injection material is pressed into the tissue stocking in order to press it against the boring wall. After pressing in the usually one

Cement sludge existing injection material are bridged by the richly resting on the Bohrstrass tissue stocking cavities in the rock.

DE 296 17 495 Ul discloses a spreader for building, which consists of at least one tubular element, wherein the element has meshes or a perforation on the entire surface. The spreader is placed in an opening, z. In masonry, and filled with a filler inside and outside the tubular member including the mesh or perforation. To increase strength, a stiffening element can be inserted into the filler.

DE 695 24 697 T2 discloses an envelope for filling with adhesive for anchoring a fastener to a Hohlblockstein- or

Brick wall or other solid construction. The shell has an elongated tubular screen member having first and second opposite ends and a uniform one

Diameter along its length. The sheath further comprises at least one reinforcing element formed along the length of the elongate sieve element, through which the sieve element is inserted into one in one first wall of the hollow block formed first opening can be inserted. The reinforcing element maintains the desired stiffness of the tubular sifting element so that it can extend transversely through an interior of the hollow block and blindly inserted into a second opening formed in a second, opposite wall of the hollow block.

It is an object of the present invention to provide a

To provide cost-effective fastening system, with a

Anchoring element can be anchored in a borehole so that the system can withstand high loads.

This object is solved by the objects with the features according to the independent claims. Further

Embodiments are shown in the dependent claims.

In accordance with one embodiment of the present invention, there is provided a method of anchoring an anchoring element in a wellbore wherein, in the method, a tissue sleeve is inserted into the wellbore, a hardenable hardening material into the wellbore

Wellbore and / or is filled into the fabric sleeve (ie in particular directly into the wellbore or indirectly into the introduced into the well tissue sleeve), so that they are each at least partially filled with the curable Aushärtmaterial, introduced the anchoring element in the tissue sleeve and in the borehole and hardening the hardening material in the wellbore (or setting) so that the anchoring element is anchored in the wellbore, whereby the fabric sleeve is made permeable to the curable (but not yet cured) hardening material.

According to another embodiment of the present invention, an arrangement for anchoring a

Anchoring element provided in a borehole, wherein the An assembly comprising a tissue sleeve adapted for insertion into the wellbore and having a curable curing material adapted to be filled into the wellbore, the tissue sleeve and the curable curing material being formed by curing the curable curing material in the wellbore

Anchoring element anchor in the borehole, wherein the

Tissue sleeve is formed permeable to the curable Aushärtmaterial.

According to yet another exemplary embodiment of the invention, a fabric sleeve and a hardenable

Curing material used for insertion into a wellbore for anchoring an anchoring element also to be introduced into the borehole in the borehole. The fabric sleeve may be permeable to the

be formed hardenable Aushärtmaterial. Alternatively or additionally, the use of a mechanical anchor can be dispensed with in use.

According to yet another exemplary embodiment of the invention, a method for dowel-free anchoring a

An anchoring element created in a borehole, wherein in the method, a tissue sleeve is inserted into the wellbore, a curable curing material is introduced into the wellbore, the

Anchoring element is inserted into the fabric sleeve and into the borehole, and the curable curing material in the wellbore for

Curing is brought so that the anchoring element is anchored in the wellbore.

According to a further exemplary embodiment of the invention is a dowel-free arrangement for anchoring a

Anchoring element provided in a borehole, wherein the

Arrangement of a tissue sleeve, which is designed for insertion into the wellbore, and having curable curing material, the

Filling is formed in the wellbore, wherein the fabric sleeve and the hardenable hardening material are formed upon insertion of the anchoring element into the fabric sleeve and into the borehole, by hardening the hardenable hardening material in the borehole

Anchor anchoring element in the borehole.

According to another exemplary embodiment of the

Invention, a fastening arrangement is provided, the one

A structural member having a borehole, a fabric sleeve at least partially inserted into the borehole, an anchoring member at least partially disposed in the fabric sleeve and anchored in the borehole, and cured curing material in the borehole

Borehole and in the tissue sleeve, wherein the cured curing material, the building element and the tissue sleeve contacted (i.e., directly touched) and thereby interconnected and contacted the anchoring element and the tissue sleeve (i.e., directly touched) and thereby interconnected, whereby

Anchoring element is anchored in the borehole.

In the context of this application, a "fabric sleeve" can be understood to mean, in particular, an open or closed hose whose wall comprises or consists of a woven material. Accordingly, a fabric can be understood to mean a fabric of filaments, filaments or fibers that are angularly spaced, in particular For example, filaments, filaments or fibers in a longitudinal direction may be referred to as warp or warp yarns, whereas filaments or filaments in a transverse direction may be referred to as weft or weft yarns A fabric sleeve may in particular be formed as a sock of fibers, for example, carbon braided hoses, glass braided hoses, aramid braided hoses or hybrid braided hoses may be used as a fabric sleeve, as such, for example via Suter Kunststoffe A G are available (for Example: CF braided hose 200.2883, CF braided hose 200.5211, glass braided hose 722.4342, glass braided hose 601.8126, glass braided hose 123.0280, aramid braided hose 555.3424 or hybrid braided hose 666.8634). As a fabric sleeve, in particular a component can be understood that consists exclusively of fabric material and can be free of other components (in particular, is free of a dowel).

In the context of this application may be under a "permeable or permeable formed for the curable Aushärtmaterial

In particular, a suitably permeable fabric sleeve reacts under pressure which is not yet cured Hardening material is applied to one side of the fabric sleeve, in that the

Curing material is passed between the threads, filaments or fibers of the fabric sleeve, instead of causing a shift of the entire wall of the fabric sleeve due to the

Pressurization comes.

In the context of this application can under a

In particular, a structural component, such as a wall, a ceiling or a floor of a building, can be understood as being a structural element, a building associated with the building element can be a building, such as a house, or a different structure, such as a building Bridge or a tunnel.

In the context of this application, the term "dowel-free" can be understood in particular to mean that the arrangement or the method does not require a mechanical dowel, a mechanical dowel being understood to be a rigid component, in particular of plastic, into which an anchoring element is insertable, wherein the mechanical dowel is spread in this insertion or expands spreading means, whereby the mechanical dowel widens the back and thereby wedged, in particular with the formation of an undercut, in a wellbore.

According to an exemplary embodiment, in addition to the curing material, a soft or flexible, bendable and / or stretchable, in particular made of a textile material or the like, fabric sleeve is used, which serves as a force bridge between the anchoring element and the Aushärtmaterial in the borehole. Thus, for example, a fabric sleeve formed as a sock-like member may serve as an additional reinforcement to further increase the load bearing the anchoring element after anchoring in the wellbore. Without wishing to be bound by any particular theory, it is presently believed that by additionally using the fabric sleeve, the likelihood of forming a fracture site within the curing material or mortar may be suppressed or even eliminated. For example, the risk that a connection between the material bounding the borehole (for example, a concrete wall) and the

Aushärtmaterial fails to be reduced by the inventive combination of fabric sleeve and Aushärtmaterial.

Thus, according to one embodiment of the invention, a composite-type fastening system is provided in which a fabric sleeve provided in addition to a curable material can improve the mechanical properties of the fastening material and replace conventionally-used filler. As such

Fabric sleeve can be made of lightweight fiber materials, it comes with advantage in the overall arrangement to a

Weight reduction. Furthermore, the inserted fabric sleeve

be produced cheaper than conventionally used Filler. Due to the crosslinking or interweaving of the fibers, threads or filaments, the fabric sleeve has a particularly reliable connection between the fibers, filaments or filaments on the one hand and the curing material on the other hand. As an example, liquid epoxy resin can penetrate as an example of a curing material in bumps and spaces between the fabric sleeve and thus the

Strengthen the bond between the different composite materials. This allows even high loads through the tissue in the

Essentially distributed to the entire filling volume within a wellbore. Thus, the tensile strength and the breaking strength of the anchorage can be increased. Furthermore, the adjustable ones offer

Properties of the fabric structure add extra to the developer

Design parameter to optimize the properties of the

Fastening system.

In addition, additional exemplary

Embodiments of the method described. These also apply to the arrangements and use.

According to one embodiment, the curable

Hardening material are thus displaced during the process and penetrate through the tissue sleeve, that it (along the entire height or only along a portion of the height of the borehole, ie at least along a portion of the borehole in the drilling direction) to a (in cross section) - in particular partially or even complete filling of the wellbore with hardening material between a borehole wall and an outer surface of the tissue sleeve, as well as with hardening material in a space between the anchoring element and the tissue sleeve. Thus, a fastening effect can have two aspects. On the one hand, the curing material conveys on the outside a connection between the borehole wall (with which the hardened hardening material is in contact) and the outside of the fabric sleeve (with which the hardened hardening material is in contact)

Curing material is in contact). On the other hand that conveys Hardening material inside a connection between the

Anchoring element (with which the hardened hardening material is in contact) and the interior of the fabric sleeve (with which the hardened hardening material is in contact). This creates a particularly stable anchorage.

According to one embodiment, the curable

Aushärtmaterial be formed between the borehole wall and the outside of the tissue sleeve and between the anchoring element and the tissue sleeve, and in particular within

Through openings of the fabric sleeve, each a cohesive connection (which may optionally contain positive and / or frictional components), but in particular a pure

cohesive connection (i.e., without positive-locking components), more particularly an adhesive bond. In this context, a "cohesive connection" can be understood as meaning a connection in which the connection partners are held together by atomic or molecular forces A cohesive connection is a non-detachable connection which can only be separated by destruction of the connection means , through the curing material mediated cohesive

Compound are an adhesive joint, a vulcanization compound or a solder joint.

According to one embodiment, the curable

Aushärtmaterial and the permeability of the fabric sleeve so

be adapted to each other that the entire curable

Hardening material can pass freely through the permeable fabric sleeve. Thus, according to this embodiment, the pores or

Through openings of the fabric sleeve be larger than the largest particles of the curable curing material, so that an unhindered transport of curing material through the fabric sleeve therethrough

is possible. Furthermore, this allows free penetration of Aushärtmaterial in the pores or through holes of the fabric sleeve, that after curing, the hardened hardening material clearly

Forms connecting bridges or bridges in the pores or through holes, which are integrally connected with hardening material inside and outside the fabric sleeve. In particular, in one embodiment, all components of a multi-component curable

Curing material pass freely through the permeable fabric sleeve.

According to one embodiment, in particular in the hardened state of the curing material, the fabric sleeve may be penetrated by the hardened curing material. This ensures a particularly reliable and strong connection between hardening material and fabric sleeve, which also the connection between

Building element and anchoring element is strengthened.

According to one embodiment, in the method further, the fabric sleeve may be attached to an insertion aid (such as a

Insertion tool) are attached and the attached to the insertion aid fabric sleeve can be inserted into the hole. Furthermore, after insertion, the insertion aid can be removed from the tissue sleeve and the insertion aid from the borehole

be led out, whereby the tissue sleeve remains in the borehole. According to this embodiment, a separate insertion aid can be provided which serves the purpose of introducing the bendable fabric sleeve in the correct position and in the correct depth into the borehole. Such an insertion aid may for example be a rod, which may have a smaller outer diameter than the anchoring element actually to be anchored. For example, the tissue sleeve may be frictionally threaded or expanded over the introducer so that it does not slip during insertion in the attached to the insertion aid state. After insertion of the tissue sleeve by means of the insertion aid, the tissue sleeve can be removed from the insertion aid be, with which the insertion aid can be removed from the well and the tissue sleeve at least partially remains in the wellbore.

According to one embodiment, the anchoring element can be inserted into the tissue sleeve after the insertion aid has been led out of the borehole. So if, due to the

supporting effect of the insertion aid, the tissue sleeve is arranged in the correct position in the wellbore, the

Anchoring element can be used. This is then permanently anchored in the borehole by curing the hardening material.

In one embodiment, in the method, the fabric sleeve may be further attached to the anchoring element and the fabric sleeve attached to the anchoring element inserted into the borehole. According to this embodiment can be dispensed with a separate insertion and instead the

Anchoring element itself be used as an insertion aid to the tissue sleeve at the correct place and in the correct depth in the

Drill hole to bring. After placing the fabric sleeve on the

Anchoring element, the two components can be introduced together in the borehole. In place can then be made by curing connection between the Aushärtmaterial, the fabric sleeve and the anchoring element.

In one embodiment, by filling the curable curing material into the wellbore, the wellbore may be partially filled (e.g., in half) with the curable curing material before the tissue sleeve is inserted into the wellbore. The filling of the borehole can be made up to such a height that in combination with the volume of tissue sleeve and

Anchoring element the hardening material the borehole in

Hardened state substantially completely closes. Is already before the insertion of the tissue sleeve and the anchoring element, the well with the still liquid or at least flowable Aushärtmaterial (ie the not yet hardened Aushärtmaterial) filled, so can be done by the subsequent impressions of fabric sleeve and anchoring element displacement of Aushärtmaterial what a full enclosing the

Can anchor element or the tissue sleeve with the curing material result. The filling of the hardening material in the borehole can be done, for example, using a syringe or a

Discharge tube or discharge hose done.

According to one embodiment, by means of filling the curable curing material into the wellbore, the tissue sleeve may be partially filled with the curable curing material, particularly after the tissue sleeve is inserted into the wellbore. According to this embodiment, the fabric sleeve itself, for example comprising a closed bottom region, is filled with the still processable flowable curing material. For example, means

following insertion of the anchoring element into the partially filled tissue sleeve, a displacement of the curing material takes place in such a way that the curing material flows into other intermediate spaces and fills them. Thus, a secure anchorage after curing can be further promoted. Alternatively, the curable

Curing material, for example, outside the borehole in the

Tissue sleeve be filled before it is introduced into the borehole.

In addition, additional exemplary

Embodiments of the arrangements described. These also apply to the procedures and use.

It is advantageous that the arrangement according to a

Embodiment of the invention is dowel-free. Thereby, the additional effort by providing a dowel and its impractical handling due to the rigidity of a dowel, especially in very deep holes can be avoided. The fabric sleeve can by at its borehole-side outer surface as well as at its anchoring element-side inner surface

Tissue structures be limited. In particular, the fabric sleeve, unlike conventional dowels be barrier mteltelfrei. The

Fabric sleeve may thus be made of fabric material, i. may be free in one embodiment of other components, such as a plastic shaft or the like.

According to one embodiment, a fabric sleeve can be used, which is formed as a woven fabric with gaps. Such spaces can be one in each dimension

Extension in a range between 1 μιη and 5 mm have, in particular between 5 μιη and 500 μηι. According to this preferred embodiment, the fabric sleeve is configured for the

curable curing material to be permeable. I'm not yet

Hardened state can thus the curing material through the

Flow through the interstices of the fabric sleeve, so that a

Flow connection between the tissue tube interior and the

To provide tissue sleeve exterior. This embodiment is preferred because filling the tissue tube interior or tissue sleeve exterior is then sufficient to still fill both areas with the curable curing material. To make the fabric sleeve permeable to Aushärtmaterial, this can be formed for example as a woven fabric. As a fabric network can be a

Fabric structure can be understood, which are formed from extending in a first direction filaments and in a second direction filaments that are woven together. With sufficient spacing between adjacent filaments, voids, holes, or spaces between the filaments form, which can serve as flow channels for the curing material. At the same time, the interweaving of the filaments provides sufficient mechanical

Stability ready that keeps the fabric web in a certain position. Nevertheless, a certain flexibility is given, which is advantageous for the insertion of the tissue sleeve. Particularly preferred is the configuration of the fabric sleeve as a fiber braid, that is a braid

Fiber components. By selecting the appropriate fiber components, it is possible to set the appropriate chemical and physical properties that the fabric sleeve should have.

According to one embodiment, the tissue sleeve and the curable curing material may be configured to permit flow of the curable curing material between an interior of the tissue sleeve and an exterior of the tissue sleeve. As a curable curing material, a conventional mortar, epoxy resin, cement or the like may be used, as in the uncured state, such a curing material has sufficient fluidity to pass through appropriately sized holes in the fabric sleeve can. This can, if only an appearance of the

Tissue sleeve is provided with the Aushärtmaterial, by exerting pressure on the Aushärtmaterial a part of which are passed through the fabric sleeve into the interior. If, on the other hand, only the interior of the fabric sleeve is filled with curing material, it is possible to transport flowable curing material from the interior to the exterior of the fabric sleeve, for example by applying pressure (for example by inserting the anchoring element).

According to one embodiment, the fabric sleeve may be formed from a flexibly bendable material, in particular from an elastically bendable material. This can ensure that the fabric sleeve adapts essentially to any shape of a borehole. In addition, the fabric sleeve can be expanded over a wide range, for example, be stretchable to over 100%. This opens a wide range of applications for embodiments of the invention. Under an elastically bendable material is understood as such, the is returned after a deflection back in the direction of its original position or original form.

According to one embodiment, a volume fraction of the material of the fabric sleeve relative to the material of the fabric sleeve and the curable curing material together may range between about 20% and about 70%, more preferably between about 30% and about 55%. Therefore, by providing the fabric sleeve, a relatively high proportion of the

Aushärtmaterials be saved, which contributes to a significant cost reduction, especially when using resin as a curing material. In addition, this has the effect that due to the often lower density of the material of the fabric sleeve over the

Aushärtmaterial (for example, carbon fibers compared to epoxy resin) it comes to a lightweight overall design. In other words, material of the fabric sleeve can be used to a considerable extent to replace filler.

According to one embodiment, the fabric sleeve may be formed as a tube with open ends or as a tube with a closed bottom. The use of a fabric sleeve with a in the

Substantially hollow-cylindrical form, that is to say as a hose with two end openings lying opposite one another, also permits an exchange of these through macroscopic end openings

Aushärtmaterial. Thus, in addition or as an alternative to perforating the wall of the fabric sleeve, an end opening may also be used to facilitate exchange of curing material. Alternatively, a closed-bottomed hose may be used, which may be particularly advantageous when the fabric sleeve is inserted using an insertion aid.

According to one embodiment, the fabric sleeve may be formed as a fiber braid. Such a fiber braid can

especially fiberglass, carbon fiber, aramid fiber, natural fiber, bamboo and / or polyamide. It is also possible to use any plastics as fiber material, in particular polymers. As fibers, structures having an aspect ratio (ie, fiber length to fiber diameter ratio) of at least five may be considered. As a fiber braid, a material can be considered in which along at least two mutually angularly oriented directions, in particular orthogonally oriented directions, fibers are interwoven with each other. In other words, extend at one

Fibrous braid first fibers along a first direction and second fibers along a second, different direction, wherein the first and second fibers are interwoven. When using such fiber materials, these can serve as a reinforcement or reinforcement of the compound.

According to one embodiment, the curable

Curing material epoxy resin and / or polyurethane and / or vinyl esters and / or polyester. Suitable curing materials are known to the person skilled in the art and can be compiled on the basis of the stated chemicals and / or other chemicals. Optionally, the appropriate curing material may be provided with additives to adjust certain properties (for example viscosity).

According to one embodiment, the arrangement may further comprise the anchoring element. The anchoring element may be a threaded rod, a rebar or a reinforcing element. The

Anchoring element in the borehole after curing of the

Hardening material is firmly embedded, may be any component, for example made of metal. It can be guaranteed by the advantageous embodiment of the connection between a wall (for example, a concrete wall) and the anchoring element in the form of fabric sleeve and cured Aushärtmaterial a particularly high load capacity. The anchoring element may for example have a length in an interval between 10 cm and 2 m have, in particular in an interval between 30 cm and 1 m. The anchoring element can also be fiber-reinforced

Composite component are carried out and prepared for example by pultrusion.

According to one embodiment, the fabric sleeve (in an unstretched state of equilibrium) may have a length in a range between about 2 cm and about 2 m, in particular in a range between about 10 cm and about 1 m. According to one embodiment, the fabric sleeve (in an unstretched state of equilibrium) may have an outer diameter in a range between about 5 mm and about 50 mm, in particular in a range between about 10 mm and about 30 mm. These dimensions indicate that the invention

Mounting arrangement for high performance requirements can be used.

According to one embodiment, the assembly may further comprise an insertion aid for removably seating on the tissue sleeve for insertion of the tissue sleeve placed on the insertion aid into the bore. Such an insertion can be performed, for example, as a simple round rod over which the fabric sleeve for

Insert can be slipped over and from the tissue sleeve can be stripped after insertion again. However, the insertion can also have gripping elements or other active control elements. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the following figures.

Figure 1 shows a kit of a sock-like fabric sleeve and a hardenable epoxy resin for anchoring a threaded rod in a borehole. FIGS. 2A to 2C are cross-sectional views of FIG

Tissue sleeves according to exemplary embodiments of the invention.

FIGS. 3 to 6 show cross-sectional views

different times during a method for anchoring a threaded rod in a borehole of a concrete wall according to an exemplary embodiment of the invention.

FIG. 7 and FIG. 8 show different views during a method of anchoring a threaded rod in a wellbore according to another exemplary embodiment of the invention

Invention.

Figure 9 is a cross-sectional view during a method of anchoring a threaded rod in a wellbore in accordance with yet another exemplary embodiment of the invention.

FIG. 10 shows a cross-sectional view while performing a method of anchoring a threaded rod in a wellbore in accordance with another exemplary embodiment of the invention

Invention.

FIG. 11 shows an illustration of a fabric sleeve in the form of a fiber braid anchored in a borehole of a concrete wall according to an exemplary embodiment of the invention.

The same or similar components in different figures are provided with the same reference numerals.

FIG. 1 shows components of an arrangement 100 or of a kit for anchoring a threaded rod 106 in a borehole, not shown in FIG. 1, of a concrete wall. This assembly 100 includes a sock-like tissue sleeve 102 to be inserted into the borehole. The fabric sleeve 102 is a braid of fibers 110, for example

Glass fibers, a first direction of extension and from crossing fibers 112, for example, also glass fibers, a second Extension direction formed. By the fibers 110, 112, a wide-meshed web-like or net-like structure is formed, so that passage openings 114 are formed between the fibers 110, 112. According to an exemplary embodiment, the passage openings 114 may have a size of about 0.1 mm edge length.

The fabric sleeve 102 simultaneously performs several functions.

When placed in a wellbore, due to its mechanical flexibility, the tissue sleeve 102 can accommodate unevenness in the wellbore. At the same time, the woven fibers 110, 112 ensure that the fabric sleeve 102 has some flexibility. It is freely bendable like a textile material. At the same time, however, she has a rigidity that keeps her shape upright. According to the embodiment in FIG. 1, the fabric sleeve is designed as a hose with a hollow-cylindrical section 116, a circular end opening 118 and a closed bottom area 120.

A second component of the assembly 100 is an epoxy 104 which may be provided in a sealable container 130. The epoxy 104 is flowable in the processing state and can cure in air to a solid.

By forming the holes or vias 114 between the interwoven fibers 110, 112, the epoxy 104 may be in the processible, liquid-viscous state therethrough

Through openings 114 flow through.

Further, the assembly 100 includes an insertion tool 150 having a cylindrical shaft 152 with a rounded end 154 and a handle 156 in an opposite end portion. To insert the tissue sleeve 102 into a borehole, as described in more detail below, the tissue sleeve 102 may be threaded over the shaft 152. Then you can put on

Condition the tissue sleeve are introduced into the hole. There, as in 1, a diameter d of the insertion tool 150 is slightly smaller than a diameter D of the threaded screw 106, the frictional forces between the insertion tool 150 and the tissue sleeve 102 are less than between the threaded rod 106 and the tissue sleeve 102. Thus, after insertion and in Positioning the tissue sleeve 102 by means of the insertion tool 150, the insertion tool 150 from the tissue sleeve 102 strip, leaving the tissue sleeve 102 in the correct position and depth in the borehole.

The fabric sleeve 102 and the epoxy 104 together allow an anchoring element, such as the

Threaded rod 106 to attach and anchor with high mechanical load capacity in a wellbore. The metallic threaded rod 106 has a shank 140, that is to say a cylindrical metal solid body, along the circumference of which a helical thread 142 is formed, which is indicated schematically in FIG. Below, with reference to Figure 3 to Figure 10 described as according to different embodiments of the invention the

Arrangement 100 can be used to the described

Anchoring to accomplish.

Figure 2A shows an embodiment of another fabric sleeve

200, which can be used instead of the fabric sleeve 102. The fabric sleeve 200 is hollow cylindrical and has open ends 202, 204. As with the fabric sleeve 102, also in the fabric sleeve 200, the wall is formed of fibers between which openings are formed. However, according to other embodiments of the invention, it is also possible, for example, to have a continuous wall of the fabric sleeve in which individual holes are provided for providing permeability. This can be done for example by means of a laser treatment.

FIG. 2B shows a fabric sleeve 220 according to another exemplary embodiment of the invention. This differs from the fabric sleeve 200 in that the bottom opening 204 is closed by a bottom element 222. This can be done for example by sewing. This embodiment has the advantage that insertion of the tissue sleeve 200 is facilitated by the fact that an insertion rod or the like can be acted upon insertion on the closed bottom element 222.

Figure 2C shows a fabric sleeve 240 according to yet another exemplary embodiment of the invention. Compared to the fabric sleeve 220 of Figure 2b, the fabric sleeve 240 differs in that it has a conically widened insertion section 242, the insertion of a threaded rod 106 and a

Insertion tool 150 facilitates. The conically widened insertion section 242 also supports insertion of a threaded rod 106, without the complete slipping of the tissue sleeve 240 into the borehole to be feared, in that the insertion section 242 forms a mechanical resistance to such slipping in shape.

In the following, a method for anchoring a threaded rod 106 in a borehole 300 according to an exemplary embodiment of the invention will be described based on FIGS. 3 to 6. In the described embodiment, the wellbore 300 has a depth of 2 m.

Figure 3 shows a first cross-sectional view of a wall or floor 302, which may be formed of concrete, for example, and wherein a wellbore 300 is formed. The borehole 300 was formed by means of a drill, for example. The term "borehole" is therefore to be understood broadly and is intended to designate any hole, in particular of substantially cylindrical geometry, in a floor 302 (or a wall) as a building element, independently of the method for producing this hole.

FIG. 3 shows that the borehole 300 is initially partially filled with an epoxy resin 104. The epoxy 104 may by means of a discharge element 304, which is shown schematically in Figure 3, are introduced into the wellbore 300. For this example, a syringe principle or a pump principle can be applied.

FIG. 4 shows another cross-sectional view in which, starting from the operating state shown in FIG. 3, a fabric sleeve 102 is slipped or pulled on an insertion tool 150. For example, this can be done such that a frictional connection between the tissue sleeve 102 and the insertion tool 150th

is trained. When the tissue sleeve 102 is threaded onto the insertion tool 150, the tissue sheath 102 and insertion tool 150 are inserted together into the wellbore 300 until the tissue sheath 102 is positioned to a desired depth in the wellbore 300. In this case, as soon as the tissue sleeve 102 dips into the still liquid epoxy resin 104, it is partially displaced, so that a greater filling of the borehole 300 occurs.

The insertion tool 150 has now fulfilled its function. It can be removed from the wellbore 300 by simple retraction, with Figure 5 showing the result.

As indicated schematically in Figure 5 with double arrows, only the replacement of still liquid epoxy 104 by the

Tissue sleeve 102 pass therethrough, more precisely through the through holes 114 therethrough.

After removal of the insertion tool 150, as shown in Figure 6, the threaded rod 106 from the outside in the arrangement according to

Figure 5 introduced. Since the threaded rod 106 has a greater lateral extent D compared to the lateral extent d of the

Inserting tool 150 has (see Figure 1) is further displaced by the insertion of the threaded rod 106, the epoxy material 104, resulting in a complete filling of the borehole 300.

Starting from the configuration of Figure 6 then remains

To wait for curing of the epoxy 104, then the Threaded rod 106 firmly anchored in the wellbore 300. It has been found that by providing the fabric sleeve 102 between the concrete material 302 and the threaded rod 106 an additional

Reinforcement takes place. It is, so to speak, a ripping out of

Threaded rod 106 under load from the well 300 further avoided.

Figure 7 and Figure 8 show how according to another

Embodiment of the invention, a threaded rod 106 can be sunk in a borehole 300 of a concrete floor 302 or a concrete wall.

Figure 7 shows first, as an insertion tool 150 with

mounted fabric sleeve 102 is inserted into the wellbore 300. In contrast to FIG. 4, the borehole 300 is in accordance with this

Embodiment not yet filled with epoxy resin.

After insertion of the tissue sleeve 102 in the well 300 can

Pulling the insertion tool 150 out of the wellbore 300, leaving only the tissue sleeve 102 in the wellbore 300.

Subsequently, again by means of an insertion tube 304 or the like, epoxy material 104 may be introduced into an interior of the tissue sleeve 102. This is shown in FIG. Again, with

Double arrows indicated that the epoxy resin 104, still in the uncured state, through the through holes 114 of the

Tissue sleeve 102 can pass, whereby the area between the borehole wall of the borehole 300 and the outside of the fabric sleeve 102 is at least partially filled with epoxy 104.

Now (not shown), the threaded rod 106 is inserted into the interior of the tissue sleeve 102. As a result, in addition, epoxy resin 104 is displaced out of the interior of the fabric sleeve 102 through the fabric sleeve 102 to its exterior, which leads to the finished anchored configuration after curing of the epoxy resin. This looks like the arrangement shown in FIG. FIG. 9 shows a further embodiment of another anchoring method. According to this embodiment, again, as shown in FIG. 3, a part of the borehole 300 is filled with liquid epoxy resin 104. Then, without using an insertion tool 150, the tissue sleeve 102 is placed directly on the

Threaded rod 106 slipped. These two components are introduced together into the wellbore 300 and displace it

Epoxy resin 104. Due to the passage openings 114 in the walls of the fabric sleeve 102, see the double arrows in Figure 9, epoxy 104 also enters the space between the threaded rod 106 and the

Fabric sleeve 102. This leads to a reliable

Anchoring.

FIG. 10 shows another cross-sectional view relating to a method according to another embodiment of the invention. Here, a fabric sleeve 200 without bottom 222, as in FIG. 2A

shown introduced into the well 300. Both the area between the borehole wall and the exterior of the fabric sleeve 102 and the area between the interior of the fabric sleeve 102 and the later position of the threaded rod 106 are filled with epoxy resin 104 in the uncured state. Then, the threaded rod 106 is inserted, whereby the arrangement of Figure 10 is completed. After curing of the epoxy resin 102, the anchoring is resilient.

11 shows an image 1100 of a fabric sleeve anchored in a borehole 1104 of a concrete wall 1102 in the form of a fiber braid 1106 according to an exemplary embodiment of the invention together with a finger 1108 of a user for size comparison.

A fabric sleeve according to exemplary embodiments of the invention may be provided as a tubular fabric, in particular as a glass fiber or carbon fiber or aramid fiber or any combination thereof (in particular glass fiber and carbon fiber, glass fiber and aramid fiber or carbon fiber and aramid fiber). Other natural fibers like Bambu, etc. are also possible. Such a fabric sleeve can be suitably formed on an anchor rod made of steel or composite, for example, with a diameter of 6 mm to 50 mm.

Examples of anchoring or fastening elements are a threaded rod made of steel or a rebar (Reinforcing bar) made of steel.

According to one embodiment of a method according to the invention, the pre-cleaned borehole is half-filled with the resin mixture. The tubing is then carefully inserted into the pre-cleaned wellbore with a thinner rod, allowing one end of the tubing to be sewn in advance. Anchor rod or rebar can be carefully inserted into the hose, taking care not to push a hose end outside the concrete into the hole. For example, the mixture may cure in 10 to 24 hours at room temperature.

According to another embodiment of a

According to the method of the invention, the tubular fabric is carefully inserted into the pre-cleaned well with a thin rod, one end of the tube being sewn shut. The resin mixture can then be introduced into the tubular fabric. Anchor rod or rebar can be carefully inserted into the tube _; Care should be taken that a hose end outside the concrete is not moved into the hole. For example, the mixture may cure in 10 to 24 hours at room temperature.

According to yet another embodiment of a

According to the method of the invention, a pre-cleaned borehole is half-filled with the resin mixture. Anchor rod or rebar will be with the

Wrapped tubular fabric, while one end of the tube can be sewn before. The anchor rod (or rebar) wrapped with the tubing can be carefully inserted into the prepared wellbore. For example, the mixture may cure in 10 to 24 hours at room temperature. In addition, it should be noted that "having" does not exclude other elements or steps and "a" or "an" does not exclude a multitude. "It should also be noted that features or steps described with reference to one of the above embodiments also may be used in combination with other features or steps of other embodiments described above, and reference signs in the claims are not intended to be limiting.

Claims

Patent claims

A method of anchoring an anchoring element (106) in a wellbore (300), the method comprising:

a) inserting a tissue sleeve (102) into the wellbore (300);

b) filling a curable curing material (104) in the wellbore (300) and / or in the fabric sleeve (102) so that they are each at least partially filled with the curable curing material (104);

c) inserting the anchoring element (106) in the tissue sleeve

(102) and into the borehole (300);

d) curing the hardenable curing material (104) in the wellbore (300) such that the anchoring element (106) is anchored in the wellbore (300);

wherein the fabric sleeve (102) is formed from a flexibly bendable and / or stretchable material,

the fabric sleeve (102) being permeable to the curable curing material (104),

wherein the curable curing material (104) during the

Is so displaced, and so penetrates through the tissue sleeve (102), that there is a, in particular complete, filling of the borehole (300) with hardening material (104) between a borehole wall and a

Outside of the fabric sleeve (102) and with curing material (104) in a space between the anchoring element (106) and the

Tissue sleeve (102) comes.

2. The method according to claim 1, wherein step a) comprises:

Attaching the tissue sheath (102) to an introducer (150) and inserting the tissue sheath (102) attached to the introducer (150) into the wellbore (300); after insertion, removal of the introducer (150) from the tissue sheath (102) and removal of the introducer (150) from the wellbore (300), the tissue sheath (102) remaining in the wellbore (300).

3. The method according to claim 1, wherein the step a) and the step c) are carried out uniformly, in particular before or after the step b).

4. The method according to any one of claims 1 to 3, wherein the step b) is carried out before or after the step a).

An assembly (100) for anchoring an anchoring element (106) in a wellbore (300), the assembly (100) comprising: a tissue sleeve (102) adapted to be inserted into the wellbore (300);

curable curing material (104) adapted to be filled into the wellbore (300);

wherein the fabric sleeve (102) and the curable curing material (104) are formed by curing the curable material

Curing material (104) in the wellbore (300) anchoring the anchoring element (106) in the wellbore (300);

the fabric sleeve (102) being permeable to the curable material

Aushärtmaterial (104) is formed, so that when filling the

curable curing material (104) into the wellbore (300) and / or into the tissue sleeve (102) and upon insertion of the anchoring element (106) into the tissue sleeve (102) and into the wellbore (300)

curable curing material (104) is thus displaced and penetrates through the fabric sleeve (102) so that it becomes a, in particular complete, Filling the borehole (300) with hardening material (104) between a borehole wall and an outer side of the fabric sleeve (102) and with hardening material (104) in a space between the borehole wall

Anchoring element (106) and the tissue sleeve (102) comes.

6. Arrangement (100) according to claim 5, wherein the fabric sleeve (102) is formed as a wide-mesh fabric network with intermediate spaces (114).

7. Arrangement (100) according to one of claims 5 or 6, wherein the fabric sleeve (102) is formed of an elastically bendable and / or stretchable material.

8. Arrangement (100) according to one of claims 5 to 7, wherein a volume fraction of the material of the fabric sleeve (102) based on the material of the fabric sleeve (102) and the curable curing material (104) together in a range between 20% and 70% , in particular in a range between 30% and 55%.

9. Arrangement (100) according to one of claims 5 to 8, wherein the fabric sleeve (102) as a hose (200) having two open ends (202, 204) or as a hose (220) with a closed, in particular sewn, end or Floor (222) is formed.

10. Arrangement (100) according to one of claims 5 to 9, wherein the fabric sleeve (102) is formed as a fiber braid, in particular at least one material which is selected from a group consisting of glass fiber, carbon fiber, aramid fiber, natural fiber, Bambu and polyamide.

The assembly (100) of any one of claims 5 to 10, wherein said curable curing material (104) comprises at least one material selected from a group consisting of epoxy resin,

Polyurethane, vinylester and polyester.

12. Arrangement (100) according to one of claims 5 to 11, further comprising the anchoring element (106), in particular formed as one of the group consisting of a threaded rod, a rebar and a reinforcing element.

13. Arrangement (100) according to one of claims 5 to 12, wherein the fabric sleeve (102) has a length in a range between 2 cm and 2 m, in particular in a range between 10 cm and 1 m.

14. Arrangement (100) according to one of claims 5 to 13, wherein the fabric sleeve (102) has an outer diameter in a range between 5 mm and 50 mm, in particular in a range between 10 mm and 30 mm.

The assembly (100) of any one of claims 5 to 14, further comprising an insertion aid (150) for removably attaching to the tissue sheath (102) for inserting the tissue sheath (102) attached to the introducer (150) into the wellbore (300). ,

16. Arrangement (100) according to one of claims 5 to 15, wherein the curable curing material (104) is formed between the

Borehole wall and the outside of the tissue sleeve (102) and between the anchoring element (106) and the tissue sleeve (102), and in particular within through holes of the

Fabric sleeve (102), each a cohesive connection, in particular, a purely cohesive connection, further in particular an adhesive bond to form.

17. Arrangement (100) according to one of claims 5 to 16, wherein the curable curing material (104) and the permeability of the

Tissue sleeve (102) are adapted to one another such that the entire curable curing material (104), in particular all components of the curable curing material (104), freely through the permeable

Tissue sleeve (102) can pass.

18. Use of an arrangement (100) comprising a fabric sleeve (102) and a curable curing material (104), in particular an assembly (100) according to one of claims 5 to 17, for insertion into a borehole (300) for anchoring a likewise in the Downhole (300) to be introduced anchoring element (106) in the wellbore (300) such that when filling the curable curing material (104) in the wellbore (300) and / or in the tissue sleeve (102) and upon insertion of the anchoring element (106) in the tissue sleeve (102) and into the wellbore (300) the curable curing material (104) is displaced and thus penetrates through the tissue sleeve (102) so that it becomes a

In particular, complete, filling the borehole (300) with

Curing material (104) between a borehole wall and a

Fabric sleeve (102) comes, in particular, the fabric sleeve (102) is formed permeable to the curable curing material (104).

19. Fastening arrangement, comprising:

a building element (302) having a borehole (300); a tissue sleeve (102) at least partially inserted into the wellbore (300), the tissue sleeve (102) being formed of a flexibly bendable and / or stretchable material;

an anchoring element (106) at least partially disposed in the tissue sleeve (102) and anchored in the wellbore (300);

cured curing material (104) in the wellbore (300) and in the fabric sleeve (102), wherein the cured curing material (104) contacts and thereby interconnects the building element (302) and the fabric sleeve (102); and the anchoring element (106) and Contacting and thereby interconnecting tissue sleeve (102) anchoring anchoring element (106) in the wellbore (300),

wherein the borehole (300) between a borehole wall and an outer side of the fabric sleeve (102) and in a space between the anchoring element (106) and the fabric sleeve (102), in particular completely, with the cured Aushärtmaterial (104) is filled.

20. Fastening arrangement according to claim 19, wherein the

Tissue sleeve (102) permeable to the curable curing material (104) and cured by the cured curing material (104).

is permeated.