期刊论文

Effect of antecedent rainfall on characteristics and stability of unsaturated overburden slope

Zeng, Ling(zlbingqing3@126.com)

中文

中南大学学报(自然科学版)

1672-7207

2018

49

1

238-246

10.11817/j.issn.1672-7207.2018.01.030

国家自然科学基金资助项目（56178073,51678074,51508040,51508079）； 湖南省重点研发计划项目（2016SK2023）； 湖南省教育厅优秀青年基金资助项目（17B013）~~；

本校为第一且通讯机构

基于非饱和渗流及非饱和抗剪强度理论,以前期降雨强度为变量,对考虑前期不同降雨强度下的边坡体积含水率、有效应力场、位移场以及边坡稳定性变化过程进行数值模拟分析,得到前期降雨强度变化对覆盖层边坡性状以及稳定性的影响。研究结果表明:前期降雨强度越大,无差别降雨作用后边坡各位置含水率越大,对边坡最终含水状态起决定性影响的是前期降雨强度;无差别降雨过后,边坡相同位置的有效应力与前期降雨强度成反比,边坡深部有效应力下降幅度较小而边坡坡脚处有效应力下降幅度较大,边坡坡脚处位移与前期降雨强度呈正比;无差别降雨过后,边坡安全系数随着前期降雨强度的增大而减小,前期降雨对边坡稳定...

Based on the unsaturated seepage and unsaturated soil shear strength theory, the rainfall intensity was used as an variables. Numerical simulation of the volumetric water content changing process, effective stress field, displacement field and slope stability were studied in different conditions of antecedent rainfall intensity. The impact of the antecedent rainfall intensity on the properties and stability of unsaturated overburden slope was obtained. The results show that larger antecedent rainfall intensity leads to greater water content of the slope after the discriminate rainfall. The ant...