间歇性降雨对滑坡稳定性的影响

Impact of Intermittent Rainfall on Landslide Stability

在导致滑坡失稳的众多因素中,降雨是影响边坡稳定性的重要因素。降雨是一个随时间变化的函数,那么对边坡稳定性的评价也应是一个长期的过程。本文考虑80 d内3次降雨对四川宝兴县硗碛乡泽根一社H2滑坡稳定性的影响,并采用GEOSTUDIO中的SLOPE/W和SEEP/W模块对其稳定性进行评价,结果表明:第一次降雨对边坡稳定性的影响最为显著;第二次、第三次降雨过程中边坡稳定性有所降低,但在雨停后,很快又稳定到降雨前的水平。本研究可为间歇性降雨情形下长期评价边坡稳定性提供借鉴和参考。

The impact of rainfall on landslides is very important.Rainfall is a function changing over time,so the evaluation of slope stability is a long process.This paper discusses the impact of three times of rainfall in eighty days on H2 landslide,which is in the First Zegen Commune of Qiaoqi Township,Baoxing County,Sichuan Province by using SLOPE / W and SEEP / W modules in GEOSTUDIO to evaluate the stability of the landslide.The results show that the impact of rainfall on slope stability was the most significant for the first time.The stability decreased in the second and third rainfalls.And when the rain stopped,the stability returned to the value before the rainfall.This study can provide the reference for the long-term evaluation of slope stability under the case of intermittent rainfall.