岳阳市强降雨天气下黏土土坡稳定性的数值模拟研究  

Numerical simulation study on slope stability with different slopes under heavy rainstorm in Yueyang City

作　　者：尹强 刘三县 唐靖淦 刘彦钊 YIN Qiang;LIU San;TANG Jinggan;LIU Yanzhao(Yueyang Planning,Surveying and Design Institute Co.,Ltd.,Yueyang 414004,China;Hunan Institute of Science And Technology College of Civil Engineering&Architecture,Yueyang 414000,China)

机构地区：[1]岳阳市规划勘测设计院有限公司,岳阳414004 [2]湖南理工学院土木建筑工程学院,岳阳414000

出　　处：《高科技与产业化》2025年第1期46-48,共3页High-Technology & Commercialization

摘　　要：影响边坡稳定性的因素有地质条件、地下水位、降雨、坡度、土的力学参数等,其中降雨是边坡失稳的主要诱发因素之一。本文采用Geostudio数值模拟中SLOPE/W模块与SEEP/W模块对边坡进行稳定性模拟计算,采用的方法为极限平衡法。研究内容为在计算出天然边坡无降雨条件下的安全系数之后在进行降雨工况模拟,在持续10天降雨303mm/d的情况下对不同坡度的边坡进行模拟,根据模拟结果显示,边坡的安全系数先急剧下降接着趋于稳定,且边坡的安全系数受坡角的影响,表现为随着坡角度数的增加,边坡的安全系数会逐渐减小;降雨过程中边坡孔隙水压力的大小与降雨时间呈正相关,由于基质吸力的影响,坡表在初始状态下存在负压,降雨一天后,坡面下部及坡脚处的孔隙水压力由负转正,且随着降雨历时的增加,坡体内部的孔隙水压力逐渐增大。The factors affecting the stability of the slope include geological conditions,groundwater level,rainfall,slope,soil mechanical parameters,etc.,among which rainfall is one of the main inducing factors of slope instability.In this paper,the stability of the slope is simulated by using the SLOPE/W module and the SEEP/W module in Geostudio numerical simulation,and the limit equilibrium method is adopted.According to the simulation results,the safety factor of the slope first decreases sharply and then tends to be stable,and the safety factor of the slope is affected by the slope angle,which is manifested as the safety factor of the slope decreases gradually with the increase of the number of slope angles.The pore water pressure of the slope during the rainfall process is positively correlated with the rainfall time,due to the influence of matrix suction,there is negative pressure on the slope surface in the initial state,and after one day of rainfall,the pore water pressure at the lower part of the slope surface and the foot of the slope turns from negative to positive,and the pore water pressure inside the slope gradually increases with the increase of rainfall duration.

关 键 词：降雨 边坡稳定性 有限元 Geostudio 

分 类 号：TU4[建筑科学—土工工程]