土木工程与管理学报2017，Vol.34Issue(4)：47-52,6.
降雨入渗条件下抗滑桩加固边坡稳定性分析
Stability Analysis of the Slope Reinforced with Anti-slide Pile Under the Condition of Rainfall Infiltration
摘要
Abstract
The values of permeability coefficient and matrix suction varying with the degree of saturation in unsaturated area of the slope were embedded into the numerical calculation, aiming at simulating the unsaturated seepage of the slope under the condition of rainfall infiltration, by using the FISH language built-in the finite difference program FLAC3D.Then the stability analysis of the unsaturated slope was realized combining with the strength reduction method based on the theory of two stress state variables proposed by Fredlund.A numerical model was established based on a typical anti-slide pile reinforced slope and the effect of rainfall infiltration on the distribution of pore pressure and slope stability was analyzed.Parametric analysis of the rainfall intensity, matric suction, and constraint type of the pile head was also presented.The results show that the infiltration front moves deeper into the slope and both the matric suction and slope safety factor decrease significantly with the increase of rainfall duration.The slope safety factor decreases with the increase of rainfall intensity.However, the slope safety factor tending to be stable and small variation is observed when the rainfall intensity is greater than the saturated infiltration coefficient of the soil.The matric suction has significant influence on the slope stability and the slope safety factor increases obviously when the matric suction is considered.The pile displacement decreases and the slope safety factor increases by setting prestressed anchor cable at the pile head.关键词
降雨入渗/非饱和渗流/数值分析/抗滑桩/边坡稳定性Key words
rainfall infiltration/unsaturated seepage/numerical analysis/anti-slide pile/slope stability分类
交通工程引用本文复制引用
郭震山,赵建斌,赵紫阳..降雨入渗条件下抗滑桩加固边坡稳定性分析[J].土木工程与管理学报,2017,34(4):47-52,6.基金项目
山西省交通建设科技项目(15-2-08) （15-2-08）
