CN101429753B - Well type heat-insulating water outlet - Google Patents

Abstract

The invention relates to a well type heat-insulated outlet, which consists of an earth layer, a hay heat-insulating layer, plastic extruding polyethylene heat-insulating materials, a reinforced concrete circular pipe, a water inlet pipe, a heat-insulated water outlet pipe, a single door and a block stone layer, wherein the well wall is provided with the preformed reinforced concrete circular pipe; the water inlet pipe is positioned on the lower part of the reinforced concrete circular pipe, and the heat-insulated water outlet pipe is positioned on the upper part of the reinforced concrete circular pipe; the plastic extruding polyethylene heat-insulating materials are arranged on the circumference of the reinforced concrete circular pipe; the block stone layer is stacked inside a well; and the earth surface is provided with the hay heat-insulating layer and the earth layer. The well type heat-insulated outlet has a simple structure and ideal heat-insulating effect, is easy and quick to construct, is favorable for drainage, reduces engineering freezing damage due to unsmooth drainage in winter, and can be widely applied to roads in cold districts and engineering underground drainage systems such as underground mines.

Description

Well type heat-insulating water outlet

Technical field

The present invention relates to a kind of cold district's ground water discharge structure, be fit to cold area roads engineering, the use of mine engineering underdrainage system.

Background technology

China has most of area to be in cold district.The highway construction of Han Qu, mine engineering all relate to phreatic stool problems.Because drain line and the usually frozen in the winter time obstruction of delivery port cause whole drainage system to lose efficacy, and make underground water overflow everywhere, form the ground ice body, thereby threaten the safety of building.Modal is the salivary flow ice disease that threatens road safety.When the underground water drainage system lost efficacy, water overflows, freezes from the roadbed top, from the hillside, roadbed side slope dumps and descends, spread to the road surface, surface drainage system blocks up, the ice dissolution in spring, because drainage channel is iced obstruction, causes melt water to wash away road, these bring very big threat to the stable of road and ancillary structure with traffic safety.

The appropriate design of underdrainage system delivery port has material impact to the drainage effect of whole drainage system.Traditional cold district underdrainage system delivery port heat-insulating property is poor, is easy to frozen shutting, and does not reach the purpose of draining in winter.In the railway bed ground water discharge of forest zone, Daxing'an Mountainrange, China northeast, someone had had once researched and developed the cone type heat-insulating water outlet, its profile is a taper, adopting rubble, piece masonry is permeable, loaded filter, the vegetation turf is as insulation layer, total is positioned on the face of land, belongs to the ground construction, and use in the location that suitable terrain slope is bigger.Because the turf heat-insulating property is poor, and unstable, the drainage effect of cone type heat-insulating water outlet is also undesirable.

Summary of the invention

In order to overcome the defective of general delivery port easy freezing and cone type heat-insulating water outlet unstable properties, the present invention aims to provide a kind of well type heat-insulating water outlet.This structure is by soil layer, the hay insulation layer, and the extruded polyethylene heat insulating material, the reinforced concrete pipe, water inlet pipe, insulation insulation outlet pipe, single open-door, block stone layer constitutes.

Realize that the technical scheme that purpose of the present invention adopts is:

A kind of well type heat-insulating water outlet, by soil layer, the hay insulation layer, the extruded polyethylene heat insulating material, reinforced concrete pipe, water inlet pipe, the insulation outlet pipe, block stone layer constitutes, and the borehole wall is precast reinforced cement pipe, and water inlet pipe is positioned at reinforced concrete pipe bottom, the insulation outlet pipe is positioned at reinforced concrete pipe top, the extruded polyethylene heat insulating material is arranged around the reinforced concrete pipe, stack piece stone in the well, the ground matrix section is hay insulation layer and soil layer.

Above-mentioned insulation outlet pipe is big near borehole wall end diameter, and port of export diameter is little.

The insulation effluent pipe mouth has a hinge type single open-door.

Insulation outlet pipe and water inlet pipe can be parallel to each other, and relative distance is 0.6～2.5m therebetween.

The extruded polyethylene material is the extruded polyethylene plate, and thickness range is 5～30cm, coefficient of thermal conductivity 0.028W/mK.

The operating principle of well type heat-insulating water outlet is:

Underground water enters in the reinforced concrete pipe by the water inlet of bottom, and when water level arrived the delivery port height and position, water flowed out from the insulation outlet pipe, and under the hydro-flow thrust effect, the single open-door of insulation effluent pipe mouth is opened, and allows water flow out.The door opening degree is by drain discharge and flow velocity decision, and when the water level reduction did not have water to flow out, single open-door was closed under action of gravity automatically, can stop cold air to enter in the well body, reaches heat insulation effect.Stack piece stone in the well and be incubated outlet pipe and adopt variable-diameter structure can improve mouth of pipe flow velocity, water velocity is big more, is not easy more to freeze, and helps draining.

Because there is the process of freezing and melting in soil around the well type heat-insulating water outlet.Calorifics problem of the present invention is the thermal field problem of band phase transformation, adopts the numerical experimentation method can carry out the checking of heat insulation effect.The thermal balance control differential equation that obtains with enthalpy method processing phase transformation problem is:

$C\frac{\∂T}{\∂t}=\frac{\∂}{\∂x}\left(\mathrm{\λ}\frac{\∂T}{\∂x}\right)+\frac{\∂}{\∂y}\left(\frac{\∂T}{\∂y}\right)+\frac{\∂}{\∂z}\left(\mathrm{\λ}\frac{\∂T}{\∂z}\right)---\left(1\right)$

In the formula: T, C, λ are respectively temperature, volume specific heat and the coefficient of thermal conductivity of medium.

Adopt above-mentioned governing equation, by Finite Element Method, heat insulation effect of the present invention is carried out numerical experimentation, the result shows: whole winter, the fluctuating temperature amplitude of well type heat-insulating water outlet was very little, and thermal loss is little.In addition, structure 2004 beginnings of the present invention are applied in the Daxing'an Mountainrange forest highway drainage system northeastward.Field observation shows: the interior water temperature of the water temperature in the well type heat-insulating water outlet and the subsoil drain that is connected differs very little.Theory is calculated and be facts have proved heat insulation effect ideal of the present invention, is beneficial to the draining in winter, reduces the freeze injury generation.

The beneficial effect of advantage of the present invention and generation is:

1, structure of the present invention began to be applied in the Daxing'an Mountainrange forest highway drainage system northeastward in 2004.Field observation shows: its structure improves temperature in delivery port, prolongs water discharge time, and the water temperature in the well type heat-insulating water outlet differs very little with water temperature in the underground insulation outlet pipe that is connected, is beneficial to the draining in winter, reduces the freeze injury generation.

2, adopt the reinforced concrete pipe to do the well body of delivery port, can reduce the effect of top layer frost-heave force, in order to avoid structure by frost heaving failure, makes be prolonged the application life of entire mechanism.Reinforced concrete pipe top adopts the extruded polyethylene plate to be incubated processing, can reduce the top soil thickness greatly, adopts precast reinforced cement pipe also to improve speed of application simultaneously; Agent structure of the present invention is positioned at below the face of land, can reduce the influence to face of land view.

3, the door of one unidirectional unlatching is set at the insulation effluent pipe mouth, and this door is outwards opened under the impulsive force effect, and is anhydrous when mobile, closes under the deadweight effect, can prevent that winter, cold air entered in the main body well.

4, the insulation outlet pipe adopts the insulation variable-diameter structure, and big near borehole wall end diameter, port of export diameter diminishes, and has increased exit velocity, reduces freezing point.

5, stack piece stone in the well, in order to flood, adopt the extruded polyethylene material to be incubated processing around the borehole wall, these measures can improve outlet water temperature, exit velocity, prolong the water discharge time in winter, reduce freeze injury and take place.

Description of drawings

Fig. 1 is a well type heat-insulating water outlet vertical section schematic diagram.

Fig. 2 is Figure 1A-A ' profile.

Fig. 3 is Figure 1B-B ' profile.

Fig. 4 is Fig. 1 C-C ' profile.

Fig. 5 is Fig. 1 D-D ' profile.

The specific embodiment

For understanding the present invention better, further specified by following examples, but be not limitation of the invention.

The well type heat-insulating water outlet that adopts with Daxing'an Mountainrange Rameau highway K106+146 is an example.Geographical coordinate: N50 ° 55.734 ', E120 ° 01.563 '.Height above sea level 738m belongs to high latitude island ever-frozen ground district.

Work progress is: dig a cylindric hole in the water outlet position, about deeply 170cm, distance from bottom ever-frozen ground upper limit 10cm.As Fig. 1-shown in Figure 5, on prefabricated reinforced concrete pipe 4 tops and bottom circular hole that a diameter 20cm respectively is set, connect insulation outlet pipe 6 and water inlet pipe 5 in advance.Bottom insulation and water proof are carried out with the dull and stereotyped sealing of the thick extruded polyethylene of 15cm in reinforced concrete pipe 4 bottoms, the side thick U-shaped extruded polyethylene plate parcel of 15cm, and the edge seals with glue; Reinforced concrete pipe 4 after the insulation processing is put into the hole, and reinforced concrete pipe 4 bottom circular holes are connected with water inlet pipe 5; In well, stack the block stone layer 8 of 1/2 borehole wall height; After will being incubated outlet pipe 6 and reinforced concrete pipe 4 top circular holes being connected, with the space between earthen backfill well and soil layer; Afterwards the top of cement pipe 4 is sealed with the thick extruded polyethylene flat board of 30cm, then the hay of water proof geomembrane parcel is made a roof fall, cover the top of whole water flowing out structure, and then in roof fall, cover the thick soil layer 1 of 20cm, prevent that first strong wind from blowing away hay insulation layer 2, second strengthens heat insulation effect.Hay insulation layer 2 average thickness 60cm.

Insulation outlet pipe 6 is 2%～20% with water inlet pipe 5 inclination range; Insulation outlet pipe 6 can be parallel to each other with water inlet pipe 5, and relative distance is 0.6～2.5m therebetween.

Single open-door 7 is connected for hinge type with 6 outlets of insulation outlet pipe; Insulation outlet pipe 6 point diameters are 15cm, and rear end (near the borehole wall) diameter is 20cm, whole insulation water outlet pipe range 120cm.Piece stone average grain diameter 10cm.Reinforced concrete pipe wall thickness 5cm.

The insulation layer of pipe of cement top and bottom adopts the extruded polyethylene flat board, the U-shaped plate of extruded polyethylene material is adopted in the side, the junction adopts glue special to connect, thickness range is 5～30cm, coefficient of thermal conductivity 0.028W/mK, compressive strength is greater than 0.3Mpa, and the volume water absorption rate is less than 1%, hay insulation layer thickness 20～80cm; Reinforced concrete thickness of pipe wall 5～8cm.It highly is 1/2～3/4 of well depth that block stone layer 8 is stacked.

Present embodiment is finished in autumn in 2004 construction, and through the practical proof in 3 winters, the structural thermal insulation of well type heat-insulating water outlet is satisfactory for result, improved the draining flow velocity, prolonged the water discharge time in winter of drainage system, reduced the generation of engineering disease.

Claims (5)

1. well type heat-insulating water outlet, mainly by soil layer (1), hay insulation layer (2), extruded polyethylene heat insulating material (3), reinforced concrete pipe (4), water inlet pipe (5), insulation outlet pipe (6), block stone layer (8) constitutes, and the borehole wall is the inside wall of reinforced concrete pipe (4), it is characterized in that: water inlet pipe (5) is positioned at reinforced concrete pipe (4) bottom, insulation outlet pipe (6) is positioned at reinforced concrete pipe (4) top, reinforced concrete pipe (4) is with extruded polyethylene heat insulating material (3) all around, stacks piece stone (8) in the well, and reinforced concrete pipe (4) top is equipped with hay insulation layer (2) and soil layer (1).

2. well type heat-insulating water outlet according to claim 1 is characterized in that, insulation outlet pipe (6) is big near borehole wall end diameter, and port of export diameter is little.

3. well type heat-insulating water outlet according to claim 1 is characterized in that, the insulation effluent pipe mouth has a hinge type single open-door (7).

4. well type heat-insulating water outlet according to claim 1 is characterized in that, insulation outlet pipe (6) is parallel to each other with water inlet pipe (5), and relative distance is 0.6～2.5m therebetween.

5. well type heat-insulating water outlet according to claim 1 is characterized in that, extruded polyethylene material (4) thickness range is 5～30cm.

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