甘肃某黄土路堑边坡降雨入渗稳定性分析  

Analysis of rainfall infiltration stability of a loess cutting slope in Gansu

作　　者：黄海萍 周杰 任永忠[2] Huang Haiping;Zhou Jie;Ren Yongzhong(Gansu Honghao Construction Group Co.,Ltd.,Lanzhou 730050,China;Lanzhou Institute of Technology,Lanzhou 730050,China)

机构地区：[1]甘肃弘昊建设集团有限公司,甘肃兰州730050 [2]兰州工业学院,甘肃兰州730050

出　　处：《山西建筑》2021年第20期99-103,共5页Shanxi Architecture

基　　金：甘肃省高等学校创新能力提升项目(2019B-180)。

摘　　要：降雨对边坡的变形及稳定性的影响举足轻重。为了研究黄土边坡在降雨入渗条件下的变形及稳定性的变形规律。以甘肃某黄土路堑边坡为研究对象,采用岩土工程有限元软件Plaxis 3D V2020进行了数值模型分析。其结论表明:随着坡角角度的增大,坡体基质吸力逐渐减小,但减小幅度不明显;随着降雨速率的增大,坡顶顶部的饱和度逐渐增加;随着降雨时长的增加,坡体内含水量的饱和度逐渐由坡顶向坡体内发展,分布比较均匀。坡体内水的流速开始从坡体表面向坡体内流动。Rainfall has a significant effect on slope deformation and stability.In order to study the deformation and stability of loess slope under rainfall infiltration conditions.Taking a loess cutting slope in Gansu province as the research object,the numerical model was analyzed by using the geotechnical engineering finite element software PLAXIS 3D V2020.The results show that the matric suction of slope decreases gradually with the increase of slope angle,but the decrease is not obvious.With the increase of rainfall rate,the saturation at the top of the slope gradually increases.With the increase of rainfall duration,the water saturation in the slope gradually develops from the top of the slope to the slope,and the distribution is relatively uniform.The velocity of water in the slope begins to flow from the surface of the slope to the slope.

关 键 词：黄土边坡 降雨入渗 基质吸力 饱和度 稳定性 

分 类 号：TU441.35[建筑科学—岩土工程]