RESEARCH ON FAILURE CHARACTERISTICS AND DETERMINATION METHOD FOR SHEAR STRENGTH OF EARTH-ROCK AGGREGATE IN DIRECT SHEAR TESTS
DENG Huafeng1，2，YUAN Xianfan1，2，LI Jianlin1，2，LUO Qian1，2，ZHU Min1，2
(1. Collaborative Innovation Center for Geo-hazards and Eco-environment in Three Gorges Area of Hubei Province，Yichang，Hubei 443002，China；2. College of Civil Engineering and Architecture，China Three Gorges University，Yichang，Hubei 443002，China)
Abstract：In direct shear tests of earth-rock aggregate，empirical method is always adopted to determine shear strengths，while less considering the variation characteristics of shear stress-shear displacement relationship curves and failure characteristics of shear plane. Based on this，big earth-rock aggregate samples with different moisture contents are collected from typical earth-rock aggregate bank slope in Three Gorges Reservoir area to carry out the indoor direct shear test. The test emphatically analyzes the variation characteristics of shear stress-shear displacement relationship curve，failure characteristics of shear plane，and shear leap phenomenon. Meanwhile，an analytical method，using critical plastic shear strength and ultimate shear strength to determine the earth-rock aggregate shear strength，is put forward. With physical significance，the method can reflect structural characteristics of earth-rock aggregate better than conventional method，and can provide reference for engineering design.
邓华锋1，2，原先凡1，2，李建林1，2，罗 骞1，2，朱 敏1，2. 土石混合体直剪试验的破坏特征及抗剪强度取值方法研究[J]. 岩石力学与工程学报, 2013, 32(s2): 4065-4072.
DENG Huafeng1，2，YUAN Xianfan1，2，LI Jianlin1，2，LUO Qian1，2，ZHU Min1，2. RESEARCH ON FAILURE CHARACTERISTICS AND DETERMINATION METHOD FOR SHEAR STRENGTH OF EARTH-ROCK AGGREGATE IN DIRECT SHEAR TESTS. , 2013, 32(s2): 4065-4072.
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2013, Vol. 32 
