层状反倾边坡弯曲倾倒破坏计算方法探讨

doi:10.13722/j.cnki.jrme.2014.0838

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Abstract Flexural toppling failure is one of the most common types of failure in layered counter-tilt slope. The limit equilibrium method is still the most common approach in the toppling failure study at present. Firstly，Based on the cantilever beam limit equilibrium model proposed by Aydan，the toppling failure limit equilibrium equation considering the influence of block top shape，damaged step height and slope toe triangle block is established. Secondly，depending on the block stability state and failure mode，blocks above the basal plane are divided into three zones that stable zone，toppling zone and sliding zone. In addition，the boundary condition is deduced. Thirdly，based on limit equilibrium equation，the calculation method of failure basal plane for flexural toppling failure in layered counter-tilt slope is proposed and a special computer code is developed. Finally，two case studies are used for practical verification of the proposed approach as well as the parametric study is conducted. The analytical results show that the angle between the failure basal plane and the plane normal to the discontinuities nearly increases linearly with the slope cut angle while decreases with the strata thickness. The results also indicate that slope failure mode gradually transforms from toppling failure to toppling-slipping failure with the increase of slope cut angle. In addition，the steeper the slope natural angle and the larger the scope of the destruction zone.

Key words： slope engineering toppling failure counter-tilt slope failure basal plane parametric analysis

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	Articles by authors
	ZHENG Yun1
	CHEN Congxin1
	LIU Xiumin1
	LIU Tingting2
	ZHOU Yichao1
	XIA Kaizong1
	FU Hua1

Cite this article:

ZHENG Yun1,CHEN Congxin1,LIU Xiumin1, et al. INVESTIGATION ON CALCULATION METHOD OF LAYERED COUNTER-TILT SLOPE FOR FLEXURAL TOPPLING FAILURE[J]. , 2015, 34(S2): 4252-4261.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0838 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4252

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