降雨入渗对非饱和土边坡稳定性影响的参数研究  

Parametric Study of Effects of Rain Infiltration on Unsaturated Slopes

作　　者：宋亚亚 何忠意 朱佩宁 卢廷浩[3,4] SONG Yaya;HE Zhongyi;ZHU Peining;LU Tinghao(Guang Dong Tianxin Electric Power Engineering Test Co.,Ltd.,Guangzhou,Guangdong 510663,China;China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd,Guangzhou,Guangdong 510663,China;Key Laboratory of Geotechnical Mechanics and Dam Engineering of the Ministry of Education,Hohai University, Nanjing,Jiangsu 210098,China;Institute of Geotechnical Engineering,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]广东天信电力工程检测有限公司,广东广州510663 [2]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663 [3]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [4]河海大学岩土工程研究所,江苏南京210098

出　　处：《水利与建筑工程学报》2019年第3期72-78,共7页Journal of Water Resources and Architectural Engineering

摘　　要：为了研究饱和渗透系数与土水特征曲线对降雨入渗条件下非饱和土边坡稳定性的影响,利用GeoStudio软件进行数值计算,对不同工况下的非饱和土边坡进行瞬态渗流分析与稳定性分析。研究结果表明,饱和渗透系数是影响非饱和土渗透性的关键因素,其对边坡稳定性与边坡破坏形式有重要影响。应力作用与干湿循环对非饱和土渗透函数形态的影响与其对土水特征曲线形态的影响一致,考虑其影响对于非饱和土边坡稳定性计算与评价是更安全合理的。In order to analyze the influence of saturation permeability coefficient and SWCC on slope stability of unsaturated soil under rain infiltration, five slope models were established and a serious of transient seepage and stability calculations were carried out based on Geo-studio. The results show that saturation permeability is an important factor influencing the permeability of soil which has great impacts on the slope stability and the damage form of slope. Besides, the influence of the vertical stress and wetting-drying cycle on the form of penetration function is same to SWCC. It is safer and more reasonable to consider this influence in slope stability evaluation.

关 键 词：非饱和土 降雨入渗 饱和渗透系数 土水特征曲线 边坡稳定性 

分 类 号：P642.2[天文地球—工程地质学]