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

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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.

Key words： soil mechanics earth-rock aggregate failure characteristics shear leap shear strength

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	Articles by authors
	DENG Huafeng1
	2
	YUAN Xianfan1
	2
	LI Jianlin1
	2
	LUO Qian1
	2
	ZHU Min1
	2

Cite this article:

DENG Huafeng1,2,YUAN Xianfan1, et al. RESEARCH ON FAILURE CHARACTERISTICS AND DETERMINATION METHOD FOR SHEAR STRENGTH OF EARTH-ROCK AGGREGATE IN DIRECT SHEAR TESTS[J]. , 2013, 32(s2): 4065-4072.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/4065

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