提高三峡水库水位日降幅对向家淌滑坡的影响分析

Research on Effect of Increasing the Daily Water Level Rate Decline of Three Gorges Reservoir on Xiangjiatang Landslide

以三峡水库向家淌滑坡为例,运用Geo-studio系列软件,通过有限元法计算分析该滑坡在日降幅增加条件下的变形情况。通过分析位移-时间场,得出该滑坡工程治理措施在日降幅增加条件下的有效性即位移集中区。结合稳定性-时间曲线分析得出该滑坡所承受日降幅阈值为1.6 m/d。通过对库区水位日降幅增加条件下的稳定性及变形分析,可为三峡库区的科学调度及安全预案编制提供依据。

Xiangjiatang landslide is analyzed as an example with the Geo- studio software to simulate the reservoirs impact on the landslide when the water level decline rate is accelerated. With the analysis of the displacement vs. time field,the effectiveness of the landslide engineering of the control measures has been calculated when the water level decline speed increases. With the analysis of the stability vs. time,the result has shown that the acceptable threshold value of thedaily decline rate of water level equals 1. 6m / d. The analysis of the stability and the deformation under the increase of the water level decline rate can provide the scientific allocation and the drafting of the contingency scheme with the reference and guidance.