Study on Estimation Method of Rock Mass Discontinuity Shear Strength Based on Three- Dimensional Laser Scanning and Image Technique
The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of exist- ing estimation methods, a new approach based on the shadow area percentage （SAP） that can be used to...
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| Published in | Journal of earth science (Wuhan, China) Vol. 23; no. 6; pp. 908 - 913 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
China University of Geosciences
China University of Geosciences
01.12.2012
Springer Nature B.V |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-487X 1867-111X |
| DOI | 10.1007/s12583-012-0301-2 |
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| Abstract | The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of exist- ing estimation methods, a new approach based on the shadow area percentage （SAP） that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical for- mula was found among SAP, normal stress, and shear strength. Data of Yujian （~ River were used as an example, and the following conclusions have been made. （1） In the case of equal normal stress, the peak shear stress is positively proportional to the SAP. （2） The formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental re- suits obtained in laboratory tests. |
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| AbstractList | The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of existing estimation methods, a new approach based on the shadow area percentage (SAP) that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical formula was found among SAP, normal stress, and shear strength. Data of Yujian () River were used as an example, and the following conclusions have been made: 1. in the case of equal normal stress, the peak shear stress is positively proportional to the SAP and 2. the formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental results obtained in laboratory tests.[PUBLICATION ABSTRACT] The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of existing estimation methods, a new approach based on the shadow area percentage (SAP) that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical formula was found among SAP, normal stress, and shear strength. Data of Yujian () River were used as an example, and the following conclusions have been made. (1) In the case of equal normal stress, the peak shear stress is positively proportional to the SAP. (2) The formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental results obtained in laboratory tests. The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of existing estimation methods, a new approach based on the shadow area percentage (SAP) that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical formula was found among SAP, normal stress, and shear strength. Data of Yujian (鱼简) River were used as an example, and the following conclusions have been made. (1) In the case of equal normal stress, the peak shear stress is positively proportional to the SAP. (2) The formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental results obtained in laboratory tests. The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of exist- ing estimation methods, a new approach based on the shadow area percentage （SAP） that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical for- mula was found among SAP, normal stress, and shear strength. Data of Yujian （~ River were used as an example, and the following conclusions have been made. （1） In the case of equal normal stress, the peak shear stress is positively proportional to the SAP. （2） The formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental re- suits obtained in laboratory tests. |
| Author | 唐辉明 葛云峰 王亮清 苑谊 黄磊 孙淼军 |
| AuthorAffiliation | Faculty of Engineering, China University of Geosciences, Wuhan 430074, China Center of Geological Environment, Department of Land and Resource of Hubei Province, Wuhan 430071, China |
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| Cites_doi | 10.1007/s12583-011-0193-6 10.1007/s10706-005-1219-6 10.1007/BF01261801 10.1007/s12583-009-0075-3 10.1016/j.tust.2005.12.018 |
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| Keywords | rock mass discontinuity shear strength rock mechanics image recognition technique estimation method three-dimensional laser scanning technique |
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| Notes | rock mechanics, rock mass discontinuity, shear strength, estimation method, three-dimensional laser scanning technique, image recognition technique. The estimation of shear strength of rock mass discontinuity is always a focal, but difficult, problem in the field of geotechnical engineering. Considering the disadvantages and limitation of exist- ing estimation methods, a new approach based on the shadow area percentage （SAP） that can be used to quantify surface roughness is proposed in this article. Firstly, by the help of laser scanning technique, the three-dimensional model of the surface of rock discontinuity was established. Secondly, a light source was simulated, and there would be some shadows produced on the model surface. Thirdly, to obtain the value of SAP of each specimen, the shadow detection technique was introduced for use. Fourthly, compared with the result from direct shear testing and based on statistics, an empirical for- mula was found among SAP, normal stress, and shear strength. Data of Yujian （~ River were used as an example, and the following conclusions have been made. （1） In the case of equal normal stress, the peak shear stress is positively proportional to the SAP. （2） The formula for estimating was derived, and the predictions of peak-shear strength made with this equation well agreed with the experimental re- suits obtained in laboratory tests. 42-1788/P SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23 |
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| References | Patton (CR12) 1966 Ge, Tang, Liu (CR5) 2011; 40 Wang, Yang (CR13) 2010; 22 Barton, Choubey (CR1) 1977; 10 Xie (CR11) 2003 CR6 Du (CR2) 1999 Kulatilake, Balasingam, Park (CR8) 2006; 24 Du, Hu, Hu (CR3) 2011; 22 Lee, Hong, Bae (CR10) 2006; 21 Du, Hu, Hu (CR4) 2009; 20 Guo (CR7) 2001 Yan (CR14) 2005 Ladanyi, Archambault (CR9) 1970; 7 Y. R. Yan (301_CR14) 2005 Y. F. Ge (301_CR5) 2011; 40 P. H. S. W. Kulatilake (301_CR8) 2006; 24 N. Barton (301_CR1) 1977; 10 S. G. Du (301_CR4) 2009; 20 M. C. Xie (301_CR11) 2003 B. Ladanyi (301_CR9) 1970; 7 F. D. Patton (301_CR12) 1966 S. W. Lee (301_CR10) 2006; 21 X. Guo (301_CR7) 2001 W. X. Wang (301_CR13) 2010; 22 S. G. Du (301_CR3) 2011; 22 301_CR6 S. G. Du (301_CR2) 1999 |
| References_xml | – volume: 22 start-page: 411 issue: 3 year: 2011 end-page: 420 ident: CR3 article-title: Comparison between Empirical Estimation by JRC-JCS Model and Direct Shear Test for Joint Shear Strength publication-title: Journal of Earth Science doi: 10.1007/s12583-011-0193-6 – volume: 24 start-page: 1181 year: 2006 end-page: 1202 ident: CR8 article-title: Natural Rock Joint Roughness Quantification through Fractal Techniques publication-title: Geotechnical and Geological Engineering doi: 10.1007/s10706-005-1219-6 – start-page: 48 year: 1999 end-page: 53 ident: CR2 publication-title: The Engineering Properties of Rock Joints – volume: 7 start-page: 1195 year: 1970 end-page: 1210 ident: CR9 article-title: Simulation of Shear Behaviour of a Jointed Rock Mass publication-title: Proc. 11th U.S. Symposium on Rock Mechanics (USRMS), Berkeley – volume: 10 start-page: 1 year: 1977 end-page: 54 ident: CR1 article-title: The Shear Strength of Rock Joints in Theory and Practice publication-title: Rock Mech. doi: 10.1007/BF01261801 – start-page: 12 year: 2003 end-page: 75 ident: CR11 publication-title: Research of Image Method Applied on the Shear Strength of Artificial Joint Surface: [Dissertation] – volume: 20 start-page: 890 issue: 5 year: 2009 end-page: 896 ident: CR4 article-title: Measurement of Joint Roughness Coefficient by Using Profilograph and Roughness Ruler publication-title: Journal of Earth Science doi: 10.1007/s12583-009-0075-3 – start-page: 3 year: 2001 end-page: 5 ident: CR7 publication-title: Study on Shear Strength-Method of Rock Joints Based on Experimental Comparison: [Dissertation] – start-page: 19 year: 2005 end-page: 38 ident: CR14 publication-title: Study on Shear Strength-Method of Rock Joints Applied in Engineering: [Dissertation] – ident: CR6 – start-page: 509 year: 1966 end-page: 513 ident: CR12 article-title: Multiple Modes of Shear Failure in Rock publication-title: Proc. First Congress of International Society of Rock Mechanics – volume: 22 start-page: 454 issue: 4 year: 2010 end-page: 457 ident: CR13 article-title: A Geometric Information on Roughness of Rock Fractures Based on Image Processing publication-title: Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition) – volume: 40 start-page: 549 issue: 4 year: 2011 end-page: 555 ident: CR5 article-title: Error Analysis in Direct Shear Rock-Mass Structural Tests publication-title: Journal of China University of Mining & Technology – volume: 21 start-page: 239 issue: 3–4 year: 2006 end-page: 244 ident: CR10 article-title: Modelling of Rock Joint Shear Strength Using Surface Roughness Parameter, publication-title: Tunnelling and Underground Sapce Technology doi: 10.1016/j.tust.2005.12.018 – volume: 24 start-page: 1181 year: 2006 ident: 301_CR8 publication-title: Geotechnical and Geological Engineering doi: 10.1007/s10706-005-1219-6 – start-page: 19 volume-title: Study on Shear Strength-Method of Rock Joints Applied in Engineering: [Dissertation] year: 2005 ident: 301_CR14 – volume: 10 start-page: 1 year: 1977 ident: 301_CR1 publication-title: Rock Mech. doi: 10.1007/BF01261801 – volume: 21 start-page: 239 issue: 3–4 year: 2006 ident: 301_CR10 publication-title: Tunnelling and Underground Sapce Technology doi: 10.1016/j.tust.2005.12.018 – volume: 22 start-page: 411 issue: 3 year: 2011 ident: 301_CR3 publication-title: Journal of Earth Science doi: 10.1007/s12583-011-0193-6 – start-page: 12 volume-title: Research of Image Method Applied on the Shear Strength of Artificial Joint Surface: [Dissertation] year: 2003 ident: 301_CR11 – volume: 22 start-page: 454 issue: 4 year: 2010 ident: 301_CR13 publication-title: Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition) – ident: 301_CR6 – start-page: 48 volume-title: The Engineering Properties of Rock Joints year: 1999 ident: 301_CR2 – start-page: 3 volume-title: Study on Shear Strength-Method of Rock Joints Based on Experimental Comparison: [Dissertation] year: 2001 ident: 301_CR7 – volume: 7 start-page: 1195 year: 1970 ident: 301_CR9 publication-title: Proc. 11th U.S. Symposium on Rock Mechanics (USRMS), Berkeley – start-page: 509 volume-title: Proc. First Congress of International Society of Rock Mechanics year: 1966 ident: 301_CR12 – volume: 20 start-page: 890 issue: 5 year: 2009 ident: 301_CR4 publication-title: Journal of Earth Science doi: 10.1007/s12583-009-0075-3 – volume: 40 start-page: 549 issue: 4 year: 2011 ident: 301_CR5 publication-title: Journal of China University of Mining & Technology |
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| SubjectTerms | Biogeosciences Discontinuity Earth and Environmental Science Earth science Earth Sciences Estimating techniques Geochemistry Geology Geotechnical Engineering & Applied Earth Sciences Laboratory tests Lasers Light sources Mathematical models Rock Rocks Scanning Shadows Shear strength Shear stress Stresses Three dimensional imaging 三维激光扫描 图像技术 实验室测试 岩体结构面 强度估算 抗剪强度 直接剪切试验 表面粗糙度 |
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| Title | Study on Estimation Method of Rock Mass Discontinuity Shear Strength Based on Three- Dimensional Laser Scanning and Image Technique |
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