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Volume 23 Issue 6
Dec 2012
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Journal of Earth Science  > 2012  >  23(6): 908-913.
Huiming Tang, Yunfeng Ge, Liangqing Wang, Yi Yuan, Lei Huang, Miaojun Sun. Study on Estimation Method of Rock Mass Discontinuity Shear Strength Based on ThreeDimensional Laser Scanning and Image Technique. Journal of Earth Science, 2012, 23(6): 908-913. doi: 10.1007/s12583-012-0301-2
Citation: Huiming Tang, Yunfeng Ge, Liangqing Wang, Yi Yuan, Lei Huang, Miaojun Sun. Study on Estimation Method of Rock Mass Discontinuity Shear Strength Based on ThreeDimensional Laser Scanning and Image Technique. Journal of Earth Science, 2012, 23(6): 908-913. doi: 10.1007/s12583-012-0301-2
shu

Study on Estimation Method of Rock Mass Discontinuity Shear Strength Based on ThreeDimensional Laser Scanning and Image Technique

doi: 10.1007/s12583-012-0301-2
  • 1.

    Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China

  • 2.

    Department of Land and Resource of Hubei Province, Center of Geological Environment, Wuhan, 430071, China

Funds:

the China Geological Survey 1212011014030

the Major State Basic Research Development Program of China (973 Program) 2011CB710600

More Information
  • Corresponding author: Yunfeng Ge, cug_gyf@foxmail.com
  • Received Date: 22 Dec 2011
  • Accepted Date: 05 Apr 2012
  • Publish Date: 01 Dec 2012
    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 (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.

     

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    • References(14)
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