考虑孔隙水压效应的非饱和土边坡失稳分析与防滑对策  

Slope Instability Analysis and Anti-slip Countermeasures of Unsaturated Soil by Considering Effect of Pore Water Pressure

作　　者：王胜[1] 赵雪 

机构地区：[1]辽宁建筑职业学院,辽宁辽阳111000 [2]煤科集团沈阳研究院有限公司,辽宁抚顺113122

出　　处：《沈阳大学学报（自然科学版）》2015年第1期64-68,共5页Journal of Shenyang University：Natural Science

基　　金：国家自然科学基金资助项目(51179031);辽宁省教育厅科学研究一般项目资助项目(L2013524)

摘　　要：以某排土场为背景,基于Terzaghi有效应力原理,建立排土场土体抗剪强度与孔隙水压关系函数,得到土体抗剪强度随孔隙水压力的增加而降低的结论.在此基础上,以非饱和土边坡稳定性判定准则为基准,通过Morgenstern-Price法分析在孔隙水压力作用下排土场边坡的稳定性,得出其破坏模式主要沿淤泥层或基底风化泥岩层滑动.根据计算结果,从边坡参数优化、水坝止水、抗滑桩加固三方面出发,提出边坡治理措施,以确保矿区安全生产.Under the background of a waste dump,the principle of Terzaghi effective stress is adopted and a function relationship between soil shear strength and pore water pressure is established.A conclusion is got that the soil shear strength decreases with the increase of the pore water pressure.Taking the stability criterion of unsaturated soil slope as benchmark,the method of Morgensternprice is used to analyze the stability of the slope under the pressure of pore water pressure and it is found that the damages of the slope are mainly caused in silt layer or basal weathered mudstone layer.According to the results,some treatment measures are proposed to ensure the production safety of diggings,such as,optimizing the slope parameters,sealing water of the dam and reinforce the antislide pile.

关 键 词：孔隙水压力 非饱和土边坡 边坡稳定性 治理 

分 类 号：TV223.4[水利工程—水工结构工程]