直线型复合式滑坡渐进破坏力学模型及稳定性研究

doi:10.13722/j.cnki.jrme.2020.0594

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Abstract The difficulties of complex landslide control lie in the determination of stability and the identification of key control parts. Taking a linear complex landslide as an example，in this paper，the method for determining the stability state and the identification of key control parts of the landslide are studied from the perspective of progressive failure process. First of all，aiming at the generalized geological structure model of the landslide，a progressive failure mechanical model is established based on the strain-softening theory. Subsequently，a five-stage division model of the progressive failure process is proposed，and the stability state equations of the landslide are constructed for each stage based on the static balance principle. The mechanical model and stability state equations reflect the changing laws of equivalent load，stress distribution，deformation characteristics and stability during the evolution of this type of landslide，and reveal the progressive failure characteristics of the landslide，involving softening from both ends to the middle and losing stability from the local to the whole. Based on this，the stability state of the landslide can be effectively determined. A case study shows that the attenuation amplitude of the landslide stability increases with the development of progressive failure. If the lengths of the two destruction zones are different，the attenuation rate of the stability of the shorter zone is greater than that of the longer zone. In addition，when the sliding bands at both ends start to shear，the equivalent load of the longer zone is greater than that of the shorter zone，showing that the shorter zone is the key control part of this type of landslide. The research has certain theoretical significance and application value.

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slope engineering linear complex landslide failure model progressive failure mechanical model ')" href="#">stability

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	DU Yi
	YAN Echuan
	CAI Jingsen
	ZHOU You
	WANG Jiyun

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DU Yi,YAN Echuan,CAI Jingsen, et al. A mechanical model of progressive failure of linear complex landslides[J]. , 2021, 40(3): 490-502.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0594 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I3/490

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