岩土工程边坡稳定性分析中的拉伸破坏问题

doi:10.13722/j.cnki.jrme.2016.0674

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Abstract

Based on the principle of strength reduction method combined with FLAC^3D numerical software，two failure criteria ware defined to consider and not consider the tensile failure. And two types of slopes，homogeneous soil slope with different slope angle and slope height，and jointed rock slope with different joint angles，were analyzed to investigate whether the tensile damage should be taken into consideration，and under what conditions the tensile strength must be considered，and the extend of the impact. The results showed that the tensile strength had little influence on the stability of homogeneous soil slopes，but it had greater influence on the jointed rock slopes. When the tensile strength criterion was considered，safety factors of the rock slopes were decreased. And the better of the slope stability，the greater of the impact of tensile damage on the calculation of the safety factor. In addition，for the rock slopes with horizontal or vertical joints，the tensile failure was necessary to be considered in the numerical modelling to obtain satisfactory slip surface and plastic zones. The two different failure criteria were also used to verify sliding failure of a mine slope in the northern part of Italy. And the results verified the previous research conclusion. Finally，different numerical methods，constitutive laws and pore water pressure were discussed in slope failure modelling.

Key words： slope engineering tensile failure strength reduction method jointed rock slope slope stability

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	Articles by authors
	GUO Fang1
	2
	3
	LIANG Zhengzhao1
	2
	3
	GONG Bin2
	3
	LI Gen2
	3

Cite this article:

GUO Fang1,2,3, et al. Tensile failure in stability analysis of rock and soil slopes[J]. , 2017, 36(S1): 3192-3205.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0674 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS1/3192

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