极限平衡法与有限元强度折减法对某公路边坡挡土墙稳定性分析

Stability Analysis of the Retaining Wall for Highway Slope Based on the Limit Equilibrium Method and the Strength Reduction Finite Element Method

针对边坡稳定性分析的极限平法和有限元强度折减法的特点进行了讨论,并结合一具体挡土墙的工程实例,采用极限平衡法和有限元强度折减法对该挡墙的整体稳定性进行了计算分析。分析结果表明:采用极限平衡法和有限元强度折减法均可以得到边坡的安全系数,且采用极限平衡法得到的安全系数值偏安全,可满足工程设计要求。采用有限元强度折减法可以得到边坡体的应力-应变,可作为极限平衡法的补充设计依据。

This paper explores the features of the limit equilibrium method and the strength reduction finite element method for slope stability analysis.Taking a retaining wall construction project as an example,the author computes and analyses the general stability of the wall using the limit equilibrium method and the strength reduction finite element method.The final result suggests that safety factor can be generated by taking either the limit equilibrium method or the strength reduction finite element method.However,the safety factor acquired from the limit equilibrium method is more accurate,meeting the standards for engineering designs.Meantime,the stress-strain of the slope can be calculated by using the strength reduction finite element method,serving as a supplement for designs taking the limit equilibrium method.