雨水浸渗作用下的岩质边坡稳定性分析  

Stability Analysis of Rock Slope under Rainwater Infiltration

作　　者：李强 LI Qiang(Shandong Provincial Communications Planning and Design Institute Group Co.,Ltd.,Jinan,Shandong 250101,China)

机构地区：[1]山东省交通规划设计院集团有限公司,山东济南250101

出　　处：《黑龙江交通科技》2025年第1期15-19,共5页Communications Science and Technology Heilongjiang

摘　　要：为了保证岩质边坡在连续降雨期间的稳定性,在G105公路沿线选取K10+200处岩质路堑边坡作为研究对象,将雨水浸渗后的岩质边坡划分为饱和区、过渡区、传导区、湿润区,分别分析了雨水浸渗后边坡的失稳模式。从模型箱、相似比、模型材料、降雨系统等方面制定了岩质边坡的相似模型试验,在坡脚布置了位移传感器,监测边坡在不同雨水浸渗时间下的位移,发现雨水浸渗时间超过12 h后,边坡位移快速增大,达到了70.5 mm,沿着软弱夹层产生了“滑移-拉裂型”破坏。同时,利用软件建立岩质边坡的计算模型,基于相似模型试验结果对有限元模型进行验证,分析了雨水浸渗时间和软弱夹层厚度对边坡稳定性的影响,计算结果表明:雨水浸渗时间越长、软弱夹层厚度越大,岩质边坡的安全系数越小,稳定性越差。In order to ensure the stability of rock slope during continuous rainfall,K10+200 rock cutting slope along G105 Highway is selected as the research object,the rock slope after rainwater infiltration is divided into saturation zone,transition zone,conduction zone and wetting zone,and the instability mode of the slope after rainwater infiltration is analyzed separately.The similarity model test of rock slope is made from the aspects of model box,similarity ratio,model material,rainfall system,etc.,it is found that the displacement of the slope increases rapidly to 70.5 mm and“slip-pull-apart”failure occurs along the weak intercalation when the infiltration time exceeds 12 hours.At the same time,the calculation model of rock slope is established by software,and the finite element model is verified based on the results of similarity model test,and the influence of rainfall infiltration time and the thickness of weak intercalation on the slope stability is analyzed,the results show that the longer the infiltration time and the thicker the weak interlayer,the smaller the factor of safety and the worse the stability of the rock slope.

关 键 词：岩质边坡 失稳机理 稳定系数 渗流 

分 类 号：U416[交通运输工程—道路与铁道工程]