加筋膨胀土边坡变形及影响因素分析

Deformation of Reinforced Expansive Soil Slope and Its Influence Factors

在利用FLAC软件模拟膨胀土边坡内部湿度应力场的基础上,对不同筋材长度、加筋间距、筋材倾角的加筋膨胀土边坡进行了模拟,分析了不同情况下的边坡滑动面位置及坡面水平位移。并对以上三个因素进行了四水平的正交试验。将实际工程的监测与数值模拟结果进行了比较,结果表明,增加筋材长度、减小加筋间距均可提高边坡稳定性,一定的倾角也有利于边坡的稳定。加筋间距对安全系数的影响较大,其次为加筋长度与加筋倾角。

The numerical simulation was conducted for reinforced expansive soil slope with the different grille length, spacing and angles based on the simulation of humidity stress field within the slope with FLAC, so as to analyze the sliding surface, displacement of the slope surface on different condition. Then an orthogonal test was also performed. The comparison of simulation results with the practical engineering measurement showed that increasing reinforcement length and slope angle, decreasing the spacing were all beneficial to the slope stability, with the grille spacing holding a greatest influence on the safety factors, followed by the length and the angle.