抗滑桩设计推力计算研究  

Study on design thrust force for anti-slide piles

作　　者：徐青[1] 刘红宇 王一凡[1] XU Qing;LIU Hongyu;WANG Yifan(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2021年第6期488-493,共6页Engineering Journal of Wuhan University

摘　　要：设计推力曲线是进行抗滑桩初步设计的重要依据,抗滑桩应满足的基本条件是使所研究边坡的抗滑稳定安全系数提高到设计值,能够直接得到边坡条间设计推力的计算方法只有剩余推力法。目前,水电工程边坡稳定分析比较流行的刚体极限平衡法商业软件,如Geo-SLOPE/W、STAB,都不包含剩余推力法。虽然Geo-SLOPE/W可以直接得到边坡现状的闭合条间推力曲线,但不能得到满足设计安全系数的非闭合条间推力曲线,即不能直接得到条间设计推力,这就不便于进行抗滑桩初步设计。针对这一问题,对Geo-SLOPE/W软件进一步开发,结合自编程序,实现了既可通过Geo-SLOPE/W平台方便地得到边坡抗滑稳定安全系数,又可同时得到Bishop法、Janbu法、Sarma法、Morgenstern-Price法(简称M-P法)以及Spencer法等各方法的条间设计推力曲线,为抗滑桩初步设计提供便利。通过工程算例,验证了方法的合理性与有效性。The design thrust curve is an important basis for the preliminary design of anti-slide pile.The basic condition of anti-slide pile is to raise the safety factor of anti-slide stability to the design value.The residual thrust method(RTM)is the only one able to provide the design thrust force directly.However,the prevalent commercial software of rigid body limit equilibrium method(LEM),such as Geo-SLOPE/W and STAB,which are popular for slope stability analysis of hydroelectric engineering,does not comprise the RTM.Although the software Geo-SLOPE/W can give the closed inter-strip thrust curve of the slope status quo,it cannot provide the non-closed inter-strip thrust curve satisfying the design safety factor,which is not convenient for the preliminary design of anti-slide piles.In order to handle this deficiency,the paper presents improved further developed software based on the Geo-SLOPE/W.Combined with self-programmed program,the factor of safety(FOS)of the slope anti-sliding stability can be conveniently obtained through the Geo-SLOPE/W platform,and the inter-strip thrust curves of methods like Bishop,Janbu,Sarma,Morgenstern-Price(M-P)and Spencer are all obtained simultaneously.In this way,the preliminary design of piles is greatly facilitated.The rationality and validity of the method are verified by an engineering example.

关 键 词：边坡 刚体极限平衡法 抗滑桩 设计推力 安全系数 

分 类 号：TV62[水利工程—水利水电工程]