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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摘要水库区内水位的周期性涨落加之降雨的影响，增加库区两岸已有及潜在滑坡的复活甚至失稳的概率，从而威胁库区沿岸居民的生命及财产安全。基于此，介绍了考虑降雨及水位变动特征的区域滑坡稳定性计算方法。该方法采用Boussinesq方法进行隔水底板倾斜的潜水非稳定运动方程的求解，得到库水位等速下降时库岸边坡中浸润线的近似解析解，继而根据不同降雨历时及强度，采用瞬态降雨入渗模型及三维斜坡稳定性计算模型进行区域滑坡稳定性的计算。以三峡库区万州库岸段为例，详细介绍提出稳定性评价方法的数据及参数获取方法，并以3种工况进行比较计算。结果表明，考虑不同的库水位状态及联合降雨条件下的模拟预测结果在一定程度上反应该地区斜坡稳定性的时空分布特征，区内库岸的稳定性对降雨的响应大于对库水位变动的响应。

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	刘磊1
	殷坤龙2
	徐勇1
	连志鹏1
	王宁涛1

关键词 ：边坡工程, 库岸滑坡, 降雨, 确定性模型, 区域稳定性评价, Scoops 3D

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

引用本文:

刘磊1，殷坤龙2，徐勇1，连志鹏1，王宁涛1. 考虑降雨及库水位变动的区域滑坡灾害稳定性评价研究[J]. 岩石力学与工程学报, 2018, 37(2): 403-414.
LIU Lei1，YIN Kunlong2，XU Yong1，LIAN Zhipeng1，WANG Ningtao1. Evaluation of regional landslide stability considering rainfall and variation of water level of reservoir. , 2018, 37(2): 403-414.

链接本文:

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

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