复杂回填曲面高陡边坡的设计与稳定性分析

Design and seismic stability analysis of high and steep slope with complex backfill curve surface

为研究郑州轨道交通某线路复杂回填曲面高陡边坡的稳定性问题,设计一种回填边坡四级放坡处理方案,利用FLAC与GEO-SLOPE软件开展边坡静力与抗震稳定性分析。结果表明:添加土工格栅后,挡土墙及边坡整体稳定性、边坡回填土与原状土分界面处的滑动稳定性均有较大提升;边坡静力安全系数均大于1.35,地震工况下安全系数均大于1.15,均满足现行规范对边坡稳定性的要求。

This paper aims to investigate the design and stability of high and steep slope with complex backfill surface on a certain line of Zhengzhou rail transit and presents a design scheme of four grade backfills slope.The study offers the static and seismic stability analysis of slope using FLAC and GEO-SLOPE softwares.The results showed that geogrid addition is followed by a greater improvement in the overall stability of retaining wall and slope,and the sliding stability of the interface between backfill and undisturbed soil;and slopes have the static safety factor greater than 1.35,and the safety factor greater than 1.15 under earthquake condition,both of which are up to the requirements of current specifications for slope stability.