›› 2011, Vol. 32 ›› Issue (11): 3379-3386.

• Geotechnical Engineering • Previous Articles     Next Articles

Discussion of strength value for interlayer shear belt

JIANG Quan1，FENG Xia-ting1，ZHOU Hui1，ZHAO Yang1， XU Ding-ping1，HUANG Ke2，JIANG Ya-li2   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Hydro China Huadong Engineering Corporation, Hangzhou 310014, China
  • Received:2011-02-07 Online:2011-11-01 Published:2011-11-09

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Abstract: For the purpose of getting the strength value of Baihetan interlayer shear belt with the characters of dislocation history, large scale spread, assembled multiplex structure, multiplex mineral, etc., six kinds of tests are introduced, including ring shear test, high stress direct shear test and triaxial compression test for soft argillization layer, and straight shear test, triaxial compression test and in-situ shear test for multiplex shear belt. Based on the testing data of above six tests, the relationships between strength of shear belt and loading mode, value of normal stress, character of specimen and moisture content are summed up. The strength properties of shear belt, include assembled structure effect, thin cementation effect, confining pressure effect and water soften effect are found. What’ more, the conceptions of “original strength” and “disturbed strength” of interlayer shear belt are put forward, which have different cohesive strengths and friction angles. These cognitions can provide useful cures for supporting design of Baihetan underground caverns and study of similar argillization layer in deep underground engineering.

Key words: shear belt, cohesive strength, internal friction angle, soft argillization layer, multi assembled structure

CLC Number: 

  • TU 45
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