土工膜衬垫填埋场边坡稳定性数值分析  

Numerical Analysis on Stability of Landfill Slope Padded by Geomembrane

作　　者：周小军[1] 陆海军[1] 刘建军[1] 

机构地区：[1]武汉工业学院多孔介质力学研究所,武汉430023

出　　处：《系统仿真学报》2009年第20期6391-6393,共3页Journal of System Simulation

基　　金：国家自然科学基金青年基金(50874102);国家863计划子课题(2007AA061303)

摘　　要：基于边坡稳定性分析的极限平衡原理,建立了考虑渗流影响和地震作用的土工膜衬垫填埋场边坡稳定性分析模型,通过对各种参数的灵敏度分析,得出了填埋场边坡安全系数的变化规律。研究结果表明:边坡角度和界面摩擦角对土工膜衬垫填埋场边坡稳定性影响最大,填埋场边坡安全系数随着边坡角度、边坡长度、渗透力、地震影响系数的增大而减小,随界面摩擦角的增大而增大,覆盖土层摩擦角的变化对填埋场安全系数基本无影响;在考虑了边坡渗流作用和地震影响时,土工膜衬垫的填埋场边坡安全系数降低。研究结果可为垃圾填埋场边坡几何参数的确定提供理论依据,同时为垃圾填埋场边坡稳定设计及防护提供技术支持。Based on the analysis of slope stability with limit equilibrium method, the model of landfill slope padded by geomembrane was established considering permeability factor and seismic action. Some beneficial laws were obtained by analyzing the various parameters. The results show that the slope angel and the interface friction angel have the most influence on the stability of the slope padded by geomembrane. The increasing of the slope angel, the length, the seepage forces and the seismic coefficient will lead to the safety factor of the landfill decrease, the increasing of the interface friction angel will lead to the safety factor increase, the variation of the friction angel of cover soil have little influence on the safety factor, the safety factor is decreased considering permeability factor and seismic action. It not only provides reference to the geometric parameter definition, but also offers technical support for the design and defense of stability of slope in landfill.

关 键 词：垃圾填埋场 土工膜 极限平衡法 数值仿真分析 边坡安全系数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]