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 PDFInfo
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- 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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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
(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
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
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
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
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
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
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
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
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
Can convert and obtain typical rock mass discontinuity JRC size effect Fractal dimensions.
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CNB2004100932248A CN1253692C (en) | 2004-12-15 | 2004-12-15 | Method for determining dimensional size effects of toughness coefficients of typical stone structural surface |
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CNB2004100932248A CN1253692C (en) | 2004-12-15 | 2004-12-15 | Method for determining dimensional size effects of toughness coefficients of typical stone structural surface |
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CN1645049A CN1645049A (en) | 2005-07-27 |
CN1253692C true CN1253692C (en) | 2006-04-26 |
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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 |
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-
2004
- 2004-12-15 CN CNB2004100932248A patent/CN1253692C/en not_active Expired - Fee Related
Cited By (4)
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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