鸡尾山高速远程滑坡运动过程PFC3D模拟

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Abstract The particle flow code in three dimensions(PFC3D) is adopted to simulate the movement process of Jiweishan landslide in Wulong County，Chongqing City. The movement process of landslide mass along the sliding surface is studied under the gravity and apparent sliding force after instability of key blocks. The following conclusions can be drawn. (1) For large long-distance landslides，if the morphology of sliding surface along the landslide movement path is determined，the friction coefficient of sliding surface and strength of sliding mass just significantly affect the distribution of sliding mass in deposited areas；and the micro-topography would have more influences on the maximum displacement of landslide. (2) The whole process of the high-speed long-distance Jiweishan landslide can be divided into two stages. The first stage is mainly the fragmentation of rock masses in source area，and the second stage is the movement and run-out of fragmental blocks. (3) It is found that the velocity of blocks in surrounding regions of sliding mass firstly reaches the maximum according to velocity and displacement monitored in field. The blocks have the characteristics of second acceleration. Combining the velocity and displacement，it is considered that the sliding body at the upper edge of sliding mass is more likely to move for a long distance. (4) For Jiweishan landslide，when the friction coefficient of sliding surface is 0.05 and the bond strength is medium(250–200 MPa)，the results obtained by PFC3D are in accord with the actual ones in the maximum degree. For such high-speed long-distance landslides，PFC3D has a good applicability，especially its three-dimensional deposition state and influential extent initially identified could provide useful references for disaster prevention and mitigation works such as determination of safe avoidance range.

Key words： slope engineering high-speed long-distance Jiweishan landslide particle flow code in three dimensions(PFC3D) movement process

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	Articles by authors
	ZHANG Long
	TANG Huiming
	XIONG Chengren
	HUANG Lei
	ZOU Zongxing

Cite this article:

ZHANG Long,TANG Huiming,XIONG Chengren, et al. MOVEMENT PROCESS SIMULATION OF HIGH-SPEED LONG-DISTANCE JIWEISHAN LANDSLIDE WITH PFC3D[J]. , 2012, 31(S1): 2601-2611.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/2601

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