降雨作用下柏堡滑坡的地下水位变化及稳定性分析

Groundwater Variation and Stability Analysis of Baibao Landslide Under Rainfall

为了降低滑坡灾害对人类生命财产造成严重破坏,需要研究滑坡现象及其稳定性。选取三峡库区柏堡滑坡作为研究对象,分析野外监测数据,使用Geo-Studio软件分别模拟了4种不同降雨类型的地下水位变化及稳定性情况,研究结果表明:该坡体物质组成有利于降雨入渗,2020年7月初发生的持续降雨是导致坡体发生滑动的直接因素;由对现场采样的试验数据所得的内摩擦角及粘聚力等参数分析确定,柏堡滑坡10 d前期降雨为峰值型降雨类型时地下水位上升最高,安全系数下降最快,并将进一步提高滑坡失稳的概率,研究成果可为后续该类滑坡的理论认知与防治提供参考。

To reduce the serious damage caused by the landslide hazards to the loss of human life and property,it is necessary to study the landslide phenomenon and the stability analysis to improve our understanding of the potential landslide risk.The Baibao landslide in the Three Gorges Reservoir area was selected as the research object and the field observation data were ana-lyzed.The groundwater variation and stability of four different rainfall types were simulated by using the Geo-Studio software.The results show that the material composition of the slope body is favorable to the rainfall infiltration.The continuous rainfall that occurred in early July 2020 was the direct factor leading to the sliding of the slope body.The internal friction angle and co-hesion were obtained from the test results of the field soil samples.The rainfall in lo days is the peak rainfall type,and the fas-test drop in the factor of safety.These will further increase the probability of the landslide instability.This study can provide a reference for the subsequent theoretical support and prevention of such landslides.