Comparison between empirical estimation by JRC-JCS model and direct shear test for joint shear strength

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• 作者：Shigui Du (1)
  Yunjin Hu (2)
  Xiaofei Hu (3)
  Xiao Guo (4)
  
• 关键词：joint shear strength ; direct shear test ; empirical estimation ; JRC ; JRC ; JCS model
• 刊名：Journal of Earth Science
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：22
• 期：3
• 页码：411-420
• 全文大小：610KB
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  2. Bandis, S., Lumsden, A. C., Barton, N. R., 1981. Experimental Studies of Scale Effects on the Shear Behavior of Rock Joints. / Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 18(1): 1-1
  3. Barton, N., 1973. Review of a New Shear Strength Criterion for Rock Joints. / Eng. Geol., 7(4): 287-32 CrossRef
  4. Barton, N., Bandis, S., 1990. Review of Predictive Capabilities of JRC-JCS Model in Engineering Practice. In: Barton, N., Stephansson, O., eds., Rock Joints. Balkema, Rotterdam. 603-10
  5. Barton, N., Choubey, V., 1977. The Shear Strength of Rock Joints in Theory and Practice. / Rock Mech. Suppl., 10(1-): 1-4 CrossRef
  6. Du, S. G., Hu, Y. J., Hu, X. F., 2009. Measurement of Joint Roughness Coefficient by Using Profilograph and Roughness Ruler. / Journal of Earth Science, 20(5): 890-96 CrossRef
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  15. Wang, J. G., Ichikawa, Y., Leung, C. F., 2003. A Constitutive Model for Rock Interfaces and Joints. / Int. J. Rock Mech. Min. Sci., 40(1): 41-3 CrossRef
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• 作者单位：Shigui Du (1)
  Yunjin Hu (2)
  Xiaofei Hu (3)
  Xiao Guo (4)
  
  1. Zhejiang Industry Polytechnic College, Shaoxing, 312000, China
  2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310027, China
  3. Jinhua University, Jinhua, 321007, China
  4. Zhejiang College of Construction, Hangzhou, 311231, China
  
• ISSN：1867-111X

文摘

In order to study the reliability of the empirical estimation of joint shear strength by the JRC (joint roughness coefficient)-JCS (joint compressive strength) model, natural rock joints of different lithologic characteristics and different sizes were selected as samples, and their shear strengths under dry and saturated conditions were measured by direct shear test and compared to those estimated by the JRC-JCS model. Comparison results show that for natural rock joints with joint surfaces closely matched, the average relative error of joint shear strength between empirical estimation and direct shear test is 9.9%; the reliability of the empirical estimation of joint shear strength by the JRC-JCS model is good under both dry and saturated conditions if the JRC is determined accounting for directional statistical measurements, scale effect and surface smoothing during shearing. However, for natural rock joints with joint surfaces mismatched, the average relative error of joint shear strength between empirical estimation and direct shear test is 39.9%; the reliability of empirical estimation of joint shear strength by the JRC-JCS model is questionable under both dry and saturated conditions.