滑带土体强度恢复过程中基质吸力变化分析  

Analysis of changes in matric suction during the strength recovery process of sliding zone soil

作　　者：曹越 华兴林 雷泉龙 张腾 CAO Yue;HUA Xinglin;LEI Quanlong;ZHANG Teng(School of Earth Science and Engineering,Nanjing University,Nanjing 210046,China;Nanjing Water Conservancy Planning and Design Institute Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]南京大学地球科学与工程学院,江苏南京210046 [2]南京市水利规划设计院股份有限公司,江苏南京210000

出　　处：《江苏水利》2024年第12期45-49,共5页Jiangsu Water Resources

基　　金：南京市水利科技资助项目(202204)。

摘　　要：河岸土体在滑坡后受湿化作用会呈现滑动面的自愈现象。为探究滑坡后滑带土体自愈行为及其对土体强度特性的影响机制,基于反复剪切和滤纸法实验,探究强度恢复过程中基质吸力对强度的影响;通过分析强度恢复、基质吸力和时间的变化,探究基质吸力对强度恢复的影响。得出边坡在临界条件下有效应力参数取值的经验公式。研究结果对滑坡区土体强度参数取值有较大指导意义。The riverbank soil will exhibit the self-healing phenomenon of the sliding surface under the influence of wetting after a landslide.In order to investigate the self-healing behavior of soils and its influence mechanism on the strength properties of soils,this paper explore the influence of matrix suction on strength recovery of soils,based on repeated shear experiments and filter paper method experiments.By analyzing the changes in strength recovery,matric suction and time,the influence of matrix suction on strength recovery is explored.An empirical formula for the value of effective stress parameters of the slope under critical conditions is obtained.The research results have great guiding significance for the value determination of soil strength parameters in landslide areas.

关 键 词：强度恢复 反复剪试验 基质吸力 

分 类 号：TV853[水利工程—水利水电工程]