›› 2016, Vol. 37 ›› Issue (8): 2285-2292.doi: 10.16285/j.rsm.2016.08.021

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study on tenso-shear coupling strength of clays

KONG Xiao-ang1, CAI Guo-qing1, ZHAO Cheng-gang1, 2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin, Guangxi 541004, China
  • Received:2015-04-22 Online:2016-08-11 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China(51478135), Beijing Municipal Natural Science Foundation(8162032), The Fundamental Research Funds for the Central Universities(2015JBM068) and Key Laboratory of Geomechanics and Geotechnical Engineeringof Guangxi (14-KF-05).

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Abstract: Traditional studies on soil strength are mainly concerned with the soils subjected to the compressive shear stress state, and only a few addressed the strength characteristics of soils subjected to uniaxial tension, triaxial tension or combinations of tenso-shear. Based on the analysis of the existing results, a tenso-shear coupling strength model is developed with considering various combinations of tenso-shear in saturated clay. The failure envelope and the peak strength line as well as the strength under multidirectional tension are analyzed, and the corresponding strength formulations with specific derivation process are obtained. Different types of saturated clay are selected for the uniaxial tensile test, direct shear test and triaxial shear test. It is shown that the proposed model performs very well. Due to the complete theoretical basis and simpler strength formulation, the proposed strength model can be conveniently applied in practice, yielding better results in understanding and analyzing the behavior of saturated soils subjected to combinations of tenso-shear, such as slope instability caused by rainfall infiltration or earthquake loading.

Key words: saturated clay, combinations of tenso-shear, tenso-shear coupling strength model, strength formulas

CLC Number: 

  • TU 442

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