考虑降雨及库水位变动的区域滑坡灾害稳定性评价研究

doi:10.13722/j.cnki.jrme.2017.1196

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Abstract The cyclical fluctuations of water level in the reservoir area combined with the rainfall increase the probability of reactivation or even instability of existing and potential landslides on both banks of the reservoir area，which threatens the safety of life and property of the residents in the reservoir area. The method of calculating the regional landslide stability considering the characteristics of rainfall and water level fluctuation was thus introduced. The unsteady equation of motion of phreatic water with inclined impervious bed was solved with Boussinesq method to derive the approximate analytical solution of groundwater level in bank slope when the reservoir water level drops uniformly. The transient rainfall infiltration model and the three-dimensional slope stability calculation model were adopted to calculate the regional landslide stability according to the different rainfall duration and intensity. Wanzhou bank of the Three Gorges Reservoir area was presented as an example with the data and parameter acquisition method in stability evaluation introduced in detail. Three different conditions were compared and calculated. The results show that the predicted results in simulation considering the different reservoir water levels and rainfalls reflect the spatial distribution characteristics of slope stability in the study area to some extent. The stability of the reservoir banks in the study area is more responsive to the rainfall than to the changes of water level of reservoir.

Key words： slope engineering reservoir landslide rainfall deterministic model regional stability evaluation Scoops 3D

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	Articles by authors
	LIU Lei1
	YIN Kunlong2
	XU Yong1
	LIAN Zhipeng1
	WANG Ningtao1

Cite this article:

LIU Lei1,YIN Kunlong2,XU Yong1, et al. Evaluation of regional landslide stability considering rainfall and variation of water level of reservoir[J]. , 2018, 37(2): 403-414.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1196 OR http://www.rockmech.org/EN/Y2018/V37/I2/403

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