期刊论文

Stability analysis of cohesive soil slope with weak interlayer under heavy rainfall

中文

土木建筑与环境工程

1674-4764

2018

40

5

109-116

10.11835/j.issn.1674-4764.2018.05.014

51508042:国家自然科学基金 51678073:国家自然科学基金 2016SK2023:湖南省重点研发计划

本校为第一机构

为了分析含软弱夹层粘性土坡在强降雨条件下的稳定性,结合某失稳边坡工程现场实际调研资料,基于饱和-非饱和渗流与非饱和抗剪强度理论,提出了一种新的含软弱夹层粘性土坡稳定性分析方法,并利用该方法分析了强降雨条件下边坡的渗流特性及安全系数变化规律。分析结果表明:降雨入渗先在边坡软弱夹层内形成暂态饱和区,且当坡顶入渗的雨水未渗流至软弱夹层时,夹层内暂态饱和区中的雨水会沿夹层上表面向着坡顶方向渗流;降雨入渗过程中,边坡基质吸力与铅直有效应力之间存在严格的正相关变化关系;随着降雨历时的增加,塑性区首先在软弱夹层内部贯通,然后向坡顶扩展,边坡安全系数逐渐降低;降雨停止一段时间...

For the stability analysis of cohesive soil slope with weak interlayer under condition of heavy rainfall, a new method is proposed based on the slope investigation data and the fleory of unsaturated seepage and shear strength to analysis the seepage characteristics and variation of safety coefficient for soil slopes containing weak interlayers. Analysis results indicate: due to rainfall infiltration, the transient saturated zone is formed in the weak interlayer of slope; Under rainfall infiltration process, there is positive correlation between...