库水位下降速率对三峡塔坪滑坡稳定性的影响

Influence of drawdown rate of reservoir water level on the stability of Taping landslide in the Three Gorges Reservoir Area

自三峡库区蓄水以来,沿岸发生了许多由于库水波动及降雨影响而导致的滑坡变形灾害。以三峡库区巫山县曲尺乡塔坪H1滑坡为例,选取2014年11月1日~2015年11月1日的库水位监测数据,基于Geo-studio软件中seep/w和slope/w模块对塔坪进行降雨和库水位下降模拟并计算分析其稳定性。结果表明:塔坪滑坡稳定性主要受库水位波动影响,降雨为次要因素。当库水下降速度越大,塔坪滑坡的稳定性系数下降的也越快。

Since the impoundment of the Three Gorges Reservoir area,many landslides have occurred along the coast due to the fluctuation of reservoir water and the influence of rainfall.Taking Taping H1 landslide in Quchi township of Wushan County in the Three Gorges Reservoir Area as an example,the monitoring data of reservoir water level from November 1,2014 to November 1,2015 are selected to simulate the rainfall and reservoir water level decline based on the seep/w and slope/w modules of Geo Studio software,and the stability is calculated and analyzed.The results show that the stability of Taping landslide is mainly affected by the fluctuation of reservoir water level,and rainfall is the secondary factor.When the reservoir water drops faster,the stability coefficient of Taping landslide decreases faster.