差异性边界约束边坡稳定性分析及治理措施研究

Study on Stability Analysis and Treatment Measures of Slope with Differential Boundary Constraints

差异性约束的边坡存在边界受力不同的特征。为了探索不同约束特征的边坡稳定性问题,本研究基于南方某地城区内存在差异性约束的边坡,进行自然条件、最不利暴雨因素等不同工况下的稳定性分析及验算,并进行监测分析。研究表明:受到两侧挡土墙的约束作用,其潜在滑动体的边界小于约束的范围,边坡的稳定性在自然工况下保持稳定;在暴雨等极端工况下极易诱发滑坡,且坡体中部不稳定性大于两侧,中部剖面不稳定系数在自然和暴雨工况下分别为1.08及0.9,这主要受差异性边界约束的影响。该研究的成功运营,验证了分析的正确性,对于既有约束的不稳定滑坡分析具有良好的借鉴价值。

The slope with differential constraints has the characteristic of different boundary forces,in order to explore the stability characteristics of slopes with different constraint characteristics.This study is based on the stability analysis,checking calculation and monitoring analysis under different working conditions such as natural conditions and the most unfavorable rainstorm factors for slopes with differential constraints in a certain urban area.The study indicates that under the constraint of retaining walls on both sides,the potential sliding boundary is smaller than the constraint range,and the stability of the slope remains stable under natural conditions.Under extreme conditions such as rainstorm,landslide is easily induced,and the instability in the middle of the slope is greater than that on both sides.The instability coefficient of the middle section is 1.08 and 0.9 under natural and rainstorm conditions,respectively,and is mainly affected by differential boundary constraints.The successful operation of this study has verified the correctness of the analysis and has good reference value for the analysis of unstable landslides with existing constraints.