防灾减灾工程学报2016，Vol.36Issue(4)：565-571,7.DOI:10.13409/j.cnki.jdpme.2016.04.009
降雨诱发型残坡积土滑坡形成机理分析
Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide
摘要
Abstract
With Majiacun landslide as an example,finite element method is employed to analyze the transient unsaturated seepage field existing in the residual slope deposit slope under rainfall infiltration and limit equilibrium technique is employed to analyze the seepage stability in this deposit slope.It analyzes the slope structure,free face,effects of rainfall on slope deformation and stabilization,as well as the process of predicting rainfall-induced landslides in residual soil slope.It is believed that the mechanism of rainfall-induced residual slope deposit landslide is:rainfall infiltration creates a weak layer in the residual slope deposit slope;toe excavation produces tensile cracks in the slope face;rainfall fills the slope cracks with water,causes slope soil saturation,reduces the shear strength,and generates hydrodynamic pressure,forms negative effect on the slope stabilization;when the slope sliding force is stronger than anti-slide force,the slope slides.关键词
暴雨滑坡/残坡积土/非饱和渗流/裂隙/稳定性分析Key words
storm-induced landslide/residual slope deposit/unsaturated seepage/fissure/stability analysis分类
天文与地球科学引用本文复制引用
杜光波,倪万魁..降雨诱发型残坡积土滑坡形成机理分析[J].防灾减灾工程学报,2016,36(4):565-571,7.
