基于强度折减法的高边坡破坏模式与安全评价

High slope failure mode and safety evaluation based on strength reduction method

本文以甘肃某高边坡稳定性分析为目的,结合现场实测参数,通过基于强度折减法的有限元分析软件-Optum G2,模拟了不同工况下高边坡支护前后的稳定性,利用弹塑性方法对边坡整体变形进行了分析,根据计算结果对高边坡稳定性进行安全评价。结果表明,强度折减法考虑了土体的本构关系及变形对应力的影响,使得计算结果更接近实际,可为边坡治理设计提供理论支持。

For the purpose of stability analysis of a high slope in Gansu,combined with on-site measured parameters,the stability of high slope support under different working onditions was simulated by the finite element analysis software Optum G2 based on strength reduction method.The elastoplastic method was used to analyze the overall deformation of the slope,and the stability of the high slope was evaluated according to the calculation results.The results showed that the strength reduction method considers the constitutive relation of soil and the influence of deformation on stress,which wakes the calculation result closer to reality and provides theoretical support for slope treatment design.