基于局部强度折减法的大型边坡安全度分区

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Abstract According to the characteristics of large-scale slope which may have multiple slip directions and multi-level slip surfaces，the method of safety zonation is proposed. Based on the theory of strength reduction， firstly，the typical geological section of the slope is selected to build a two-dimensional(2D) numerical model. Failure modes can be detected by applying local strength reduction to the model to search the potential failure surfaces at different depths. By using limit equilibrium method for each potential failure surface，the slope stability coefficients at varied depths and levels are obtained. Secondly，three-dimensional(3D) numerical model is established to analyze the influence area of different failure modes based on the local strength reduction. Thirdly，the safety of the slope can be zoned through aforementioned comprehensive analysis of slope stability coefficients and influence areas. Finally，the method is applied to the slope of Longjiang super large bridge；and the analysis results show that this method is effective for comprehensively demonstrating the stable state of large-scale slopes. The method can also provide guideline for the monitoring design，reinforcement design and construction design of slope.

Key words： slope engineering large-scale slopes multi-level stability local strength reduction safety zonation

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	Articles by authors
	XIAO Ruihua1
	2
	WANG Sijing1
	HE Xiaohei1
	ZHANG Xiaoping1
	3
	RAO Xiaoyu4
	LUO Bin4

Cite this article:

XIAO Ruihua1,2,WANG Sijing1, et al. SAFETY ZONATION OF LARGE-SCALE SLOPES BASED ON LOCAL STRENGTH REDUCTION METHOD[J]. , 2013, 32(s2): 3928-3937.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3928

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