›› 2017, Vol. 38 ›› Issue (S1): 53-60.doi: 10.16285/j.rsm.2017.S1.006

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A method for determinating shear strength using shear stress concentration factor and its engineering application

LIU Shi-wei1,2, SHENG Qian1,3, GONG Yan-feng2, LENG Xian-lun1, CHEN Zi-jing4, LI Jian-he1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China; 2. China Railway Siyuan Survey and Design Group Co., Ltd, Hubei Provincial Engineering Laboratory for Underwater Tunnel., Wuhan, Hubei, 430063, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. School of Civil Engineering and Architecture, Nanchang University，Nanchang，jiangxi 330031，China
  • Received:2017-02-23 Online:2017-06-22 Published:2018-06-05
  • Supported by:

    This work was supported by the NSFC-United Fund Key Support Project of Yunnan(U1402231) , the National Program on Key Basic Research Project of China(973 Program) (2015CB057905), and the National Natural Science Foundation of China(51279202).

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Abstract: This paper proposes a method for determination of shear strength based on stress concentration factor by investigating the distribution regularity of stress concentration factor in the shear plane and analyzing the curves of shear stress-shear displacement. Laboratory large-scale direct shear tests are conducted on the specimens from clay layer with breccia along Wuhan metro line 6. the variations of shear strength parameters of the soil layer with the stone content variation are determined. Through comparing this method with procedures in codes, the feasibility of this method are discussed. The results show that the stress concentration factor K0 partly reflect the shear strength of the soil; the cohesion of clay containing breccia approximately increases linearly with the increase of stone content, which is consistent with the existing research results. This method for shear strength based on stress concentration factor, can be used as an effective way to study soil strength characteristics.

Key words: direct shear test, interfacial stress, shear strength, rock content, shear stress concentration factor

CLC Number: 

  • TU 443

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