CN1253692C - Method for determining dimensional size effects of toughness coefficients of typical stone structural surface - Google Patents

Method for determining dimensional size effects of toughness coefficients of typical stone structural surface Download PDF

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Publication number
CN1253692C
CN1253692C CNB2004100932248A CN200410093224A CN1253692C CN 1253692 C CN1253692 C CN 1253692C CN B2004100932248 A CNB2004100932248 A CN B2004100932248A CN 200410093224 A CN200410093224 A CN 200410093224A CN 1253692 C CN1253692 C CN 1253692C
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jrc
section
value
roughness coefficient
size effect
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CN1645049A (en
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杜时贵
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Jinhua Polytechnic
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Jinhua Polytechnic
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Abstract

The present invention relates to a method for determining a size effect fractal dimension of toughness coefficients of a typical stone structural surface. The method comprises the following steps: step 1, measurement sections are arranged; step 2, contour curves are drawn; step 3, the fluctuation amplitude Ry0 of the contour curve of the measurement section of 10cm is measured; step 4, the value of a roughness coefficient JRC0 of the measurement section of 10cm is calculated according to a formula; step 5, an expected value E (JRC0) of JRC0 is solved; step 6, the fluctuation amplitude Ry30 of the contour curve of the measurement section of 30cm is measured; step 7, the value of a roughness coefficient JRC30 of the measurement section of 30cm is calculated according to a formula; step 8, an expected value E (JRC30) of JRC30 is solved; step 9, according to E (JRC30) =E (JRC10) [L30 /L10]<-D>, a JRC size effect fractal dimension D of a typical stone structural surface can be obtained by conversion. The JRC size effect fractal dimension D of the typical stone structural surface, which is obtained by the present invention by conversion, embodies the influence for the JRC size effect of the stone structural surface from different stone components.

Description

Dimensional size effects of toughness coefficients of typical stone structural surface is determined method
(1) technical field
The present invention relates to typical rock mass discontinuity JRC size effect Fractal dimensions, be applicable to that rock structural plane roughness coefficient JRC is determined on the rock mass discontinuity surface of part exposure nThe occasion of value.
(2) background technology
Before the present invention made, prior art did not still have typical rock mass discontinuity JRC size effect Fractal dimensions, rock structural plane roughness coefficient JRC nDefinite method of value is the roughness coefficient JRC of the standard size rock mass discontinuity that measures with exposure rock mass discontinuity scope 0Value is according to the JRC size effect experimental formula of Barton JRC n = JRC 0 [ L n L 0 ] - 0.02 JRC 0 Calculate rock structural plane roughness coefficient JRC nValue.Because the rock mass discontinuity JRC size effect feature of different wall rock compositions is not quite similar, by the JRC size effect experimental formula of Barton JRC n = JRC 0 [ L n L 0 ] - 0.02 JRC 0 The rock structural plane roughness coefficient JRC that calculates nValue can not embody the difference of the rock mass discontinuity JRC size effect of the different wall rock of tool composition well, the rock structural plane roughness coefficient JRC that is obtained by this technology nValue can not truly reflect the JRC size effect feature of different wall rock composition rock mass discontinuities.
(3) summary of the invention
The object of the invention is to overcome the rock structural plane roughness coefficient JRC that prior art calculates nValue can not embody the shortcoming of the rock mass discontinuity JRC size effect of the different wall rock of tool composition well, provide a kind of dimensional size effects of toughness coefficients of typical stone structural surface to determine method, thereby be applicable to the rock structural plane roughness coefficient JRC that determines the tool size effect on the rock mass discontinuity surface of part exposure n
Dimensional size effects of toughness coefficients of typical stone structural surface of the present invention is determined method, comprises following sequential steps:
(1) corresponding required direction of measurement arranges that evenly statistics requisite number purpose length is respectively the survey section of 10cm and 30cm;
(2) adopt profilograph to draw the contour curve of above-mentioned survey section;
(3) measure the relief intensity R that above-mentioned 10cm surveys each contour curve of section Y10
(4) by formula JRC 10 = 49.2114 e 29 450 arctan [ 4 R y 10 5 ] Calculate each 10cm respectively and survey section roughness coefficient JRC 10Value;
(5) survey the different roughness coefficient of section according to each 10cm and calculate JRC 10Expectation value E (JRC 10);
(6) measure the relief intensity R that above-mentioned 30cm surveys each contour curve of section Y30
(7) by formula JRC 30 = 49.2114 e 29 L 10 450 L 30 arctan [ 8 R Y 30 L 30 ] Calculate each 30cm respectively and survey section roughness coefficient JRC 30Value;
(8) survey the different roughness coefficient of section according to each 30cm and calculate JRC 30Expectation value E (JRC 30);
(9) by JRC size effect fractal model E ( JRC 30 ) = E ( JRC 10 ) [ L 30 L 10 ] - D , Can convert and obtain typical rock mass discontinuity JRC size effect Fractal dimensions.
Employing the present invention have the following advantages: the rock structural plane roughness coefficient JRC that statistical measurement obtains 10And JRC 30Value has representative preferably, and precision meets the demands, the typical rock mass discontinuity JRC size effect Fractal dimensions that obtains that converts has thus embodied the influence of different wall rock compositions to rock mass discontinuity JRC size effect, is the rock structural plane roughness coefficient JRC of quantitative statistical analysis tool size effect nValue provides effective means, has bigger implementary value and economic results in society.
(4) embodiment
Open-air actual measurement statistics obtains the roughness coefficient JRC that surface, limestone joint sample length is respectively 128 contour curves of 10cm and 30cm 10And JRC 30Statistical value be respectively 8.31 and 4.93, by JRC size effect fractal model E ( JRC 30 ) = E ( JRC 10 ) [ L 30 L 10 ] - D Conversion obtains limestone joint JRC size effect Fractal dimensions=0.4758.

Claims (1)

1, a kind of dimensional size effects of toughness coefficients of typical stone structural surface is determined method, it is characterized in that comprising following sequential steps:
(1) corresponding required direction of measurement arranges that evenly statistics requisite number purpose length is respectively the survey section of 10cm and 30cm;
(2) adopt profilograph to draw the contour curve of above-mentioned survey section;
(3) measure the relief intensity R that above-mentioned 10cm surveys each contour curve of section Y10
(4) by formula JRC 10 = 49.2114 e 29 450 arctan [ 4 R y 10 5 ] Calculate each 10cm respectively and survey section roughness coefficient JRC 10Value;
(5) survey the different roughness coefficient of section according to each 10cm and calculate JRC 10Expectation value E (JRC 10);
(6) measure the relief intensity R that above-mentioned 30cm surveys each contour curve of section Y30
(7) by formula JRC 30 = 49.2114 e 29 L 10 450 L 30 arctan [ 8 R Y 30 L 30 ] Calculate each 30cm respectively and survey section roughness coefficient JRC 30Value;
(8) survey the different roughness coefficient of section according to each 30cm and calculate JRC 30Expectation value E (JRC 30);
(9) by JRC size effect fractal model E ( JRC 30 ) = E ( JRC 10 ) [ L 30 L 10 ] - D , Can convert and obtain typical rock mass discontinuity JRC size effect Fractal dimensions.
CNB2004100932248A 2004-12-15 2004-12-15 Method for determining dimensional size effects of toughness coefficients of typical stone structural surface Expired - Fee Related CN1253692C (en)

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Cited By (4)

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US8776103B2 (en) 1996-12-11 2014-07-08 The Nielsen Company (Us), Llc Interactive service device metering systems
US9100132B2 (en) 2002-07-26 2015-08-04 The Nielsen Company (Us), Llc Systems and methods for gathering audience measurement data
US9124769B2 (en) 2008-10-31 2015-09-01 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content
CN104359772B (en) * 2014-10-08 2016-09-14 绍兴文理学院 The normal stress threshold value determination method of rock mass discontinuity peak value angle of friction

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CN103644866B (en) * 2013-12-10 2014-12-24 中国地质大学(武汉) Rock mass structure surface roughness evaluation method overcoming size effect
CN103884312B (en) * 2014-04-10 2016-05-18 内蒙古科技大学 A kind of rock structural face appearance and size effect analysis method
CN104833333B (en) * 2015-03-09 2017-06-20 绍兴文理学院 Structural plane roughness coefficient dimensional effect sample characterization unit determines method
CN104881564B (en) * 2015-03-09 2017-10-13 绍兴文理学院 The construction method of structural plane roughness coefficient dimensional effect probability density estimation
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CN105466790B (en) * 2015-11-10 2017-12-29 内蒙古科技大学 A kind of rock structural face shear strength appraisal procedure of anisotropic character
CN105716545B (en) * 2016-02-01 2018-01-19 绍兴文理学院 Structural plane roughness coefficient evaluation method based on Dice similarity measures
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CN106769276B (en) * 2016-11-14 2019-07-12 绍兴文理学院 Three-dimensional structure face aliquot part choosing method based on Dice similarity measure
CN107194116B (en) * 2017-06-16 2020-08-11 宁波大学 Engineering rock structural plane roughness coefficient size effect value taking method
CN107091769B (en) * 2017-06-16 2020-10-27 绍兴文理学院 Method for dereferencing size effect value
CN107655459B (en) * 2017-09-07 2020-11-27 南京理工大学 Measuring and calculating method for surface roughness of field rock structure
CN107843215B (en) * 2017-09-13 2019-10-11 绍兴文理学院 Based on the roughness value fractal evaluation model building method under optional sampling spacing condition
CN109029334B (en) * 2018-07-12 2020-06-02 宁波大学 Rock mass structural plane roughness coefficient size effect global search measurement method
CN109099880B (en) * 2018-07-12 2020-08-11 宁波大学 Rock mass structural plane roughness coefficient global search measuring method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8776103B2 (en) 1996-12-11 2014-07-08 The Nielsen Company (Us), Llc Interactive service device metering systems
US9100132B2 (en) 2002-07-26 2015-08-04 The Nielsen Company (Us), Llc Systems and methods for gathering audience measurement data
US9124769B2 (en) 2008-10-31 2015-09-01 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content
CN104359772B (en) * 2014-10-08 2016-09-14 绍兴文理学院 The normal stress threshold value determination method of rock mass discontinuity peak value angle of friction

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