一种三维均质土坡滑动面搜索的新方法

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Abstract Two random curves are generated through a stochastic method：One is mother line，by which and slope line cross-section size on sliding direction of three-dimensional sliding body surrounded is the largest；and the other is standard line，by which and slope line cross-section size on perpendicular sliding direction surrounded is the largest. The three-dimensional sliding surface is generated through standard line moving on the mother line or mother line moving on the standard line. So sliding body is easily divided into n×m vertical stripes in the generation process of three-dimensional sliding surface，and it facilitates calculation of micro-components of stripes in formula of three-dimensional factor of safety and to generate graphic of three-dimensional sliding surface. In this process，in order to improve the accuracy of random search，the approximate mother line and approximate standard line are used instead of random mother line and random standard line respectively. Then the most dangerous sliding surface is found by searching arbitrary three-dimensional sliding surface generated by approximate mother line and approximate standard line. Examples of three-dimensional homogeneous slopes show that results computed by this method are smaller than those of previous studies，so it is safer and also proved that this method is practicable. At the same time，by studying the impact of length of sliding body on stability of slope，it shows that stability of three-dimensional slope is better than that of two-dimensional slope；with increasing length of the sliding body，stability problems of three-dimension tends to those of two-dimension. In addition，according to the analysis of the shape of standard line and comparison of mother line and two-dimensional sliding surface，it proves that it is feasible to simplify three-dimensional sliding surface to be two-dimensional arc.

Key words： slope engineering three-dimensional homogeneous soil slope mother line standard line sliding surface stability analysis factor of safety

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	DENG Dongping
	LI Liang
	ZHAO Lianheng

Cite this article:

DENG Dongping,LI Liang,ZHAO Lianheng. A NEW METHOD FOR SEARCHING SLIDING SURFACE OF THREE-DIMENSIONAL HOMOGENEOUS SOIL SLOPE[J]. , 2010, 29(S2): 3719-3727.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3719

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