期刊论文

Formation mechanism and distribution of transient saturated areas of residual slope under rainfall conditions

Zeng, L.

中文

土木建筑与环境工程

1674-4764

2017

39

2

1-10

10.11835/j.issn.1674-4764.2017.02.001

国家自然科学基金(51508040、51508042、51508079、51678074);湖南省自然科学基金(2016JJ3010);湖南省重点研发计划(2016SK2023);长沙理工大学特殊环境道路工程湖南省重点实验室开放基金(kfj150504)National Natural Science Foundation of China(51508040,51508042,51508079,51678074);National Natural Science Foundation of Hunan Province(2016JJ3010);Key Research and Development Plan of Hunan Province(2016SK2023);Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province(kfj150504)

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降雨是引起坡积土边坡失稳的最常见外部因素之一。雨水的入渗在引起土体抗剪强度参数降低的同时,还将导致土体重度的增加、基质吸力的降低,最终造成边坡的失稳。开展雨水在边坡内部的渗流过程研究已成为分析边坡在降雨条件下稳定性的前提。基于有限元数值模拟方法,进行了雨水在土体中渗流过程的模拟,着眼于降雨条件下边坡暂态饱和区的形成、分布及消散特征,描述了该过程中边坡内部含水率、基质吸力、水力梯度的变化规律。结果表明:暂态饱和区形成的主要原因是土体中向湿润锋下方渗出的雨水量小于降雨入渗补给量,从而使得土体中的含水率累积升高;暂态饱和区的形成与降雨强度、降雨时间具有十分密...

Rainfall is one of the most common external factors causing the instable residual soil slope. Rainwater infiltration leads to the reduction of the soil shear strength, the increase of the weight of soil and the decrease of the matric suction, so as to cause the slope instability. The study of rainfall infiltration inside the slope has become the precondition of the study of the slope stability under the rainfall condition. Basing on the finite element numerical simulation method, this paper focuses on the simulation of rainfall infiltration pro...