摘要
国内外学者进行了大量关于降雨条件下无缺陷边坡的破坏试验,但是自然界的边坡多存在缺陷。进行了降雨条件下含缺陷边坡与均质边坡的离心模型试验,表示出了边坡的湿润峰,测量了边坡的位移场变化,分析了均质和含缺陷边坡的变形和失稳特性。试验结果表明,降雨条件下缺陷使得雨水入渗速度增加,含缺陷边坡和均质边坡显示出不同的湿润峰,含缺陷边坡变形更严重。缺陷改变了滑裂面深度和缺陷形状,使边坡出现冲刷破坏和滑动破坏复合破坏模式,而均质边坡仅存在冲刷破坏。在降雨条件下,缺陷改变了土体内部的应变分布,加速了缺陷附近土体滑动,从而加剧了边坡破坏。
The scholars at home and abroad have carried out a large number of failure tests on defect-free slopes under rainfall conditions,but most of the slopes in nature are defective.In this study,the centrifugal model tests on the defective and homogeneous slopes are carried out under rainfall conditions.The wetting peaks of the slopes are expressed,the changes displacement field of the slopes are measured,and the deformation and instability characteristics of the homogeneous and defective slopes are analyzed.The test results show that the velocity of rainwater infiltration increases due to the defects under rainfall conditions,and the defective slope and the homogeneous slope exhibit different wetting peaks,and the deformation of the defective slope is more severe.The defects change the depth of the slip surface and the shape of the defects,so that the slope has a composite failure mode of scouring failure and sliding failure,while the homogeneous slope only has erosion failure.Under rainfall conditions,the defect changes the strain distribution in the soil,accelerates the soil sliding near the defect,and aggravates the slope failure.
作者
周煜川
刘素嘉
张嘎
ZHOU Yuchuan;LIU Sujia;ZHANG Ga(Department of Hydraulic Engineering,Tsinghua University,Beijing 100084,China)
出处
《岩土工程学报》
北大核心
2025年第S1期117-121,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(524B2132)。
关键词
降雨
缺陷
边坡
离心模型试验
破坏模式
rainfall
defect
slope
centrifugal model test
failure mode
