废旧轮胎加筋路堤边坡数值模拟计算分析

Numerical Simulation Analysis of Waste Tires Reinforced Embankment Slope

在前期振动台模型试验的基础上,通过FLAC^(3D)数值模拟计算对比分析,对地震作用下路堤边坡模型的加速度响应性能,废旧轮胎的加筋效果进行了探讨。结果表明,与素土边坡相比,废旧轮胎加筋可有效地阻隔地震力的传递,降低路堤边坡对地震加速度的放大效应和路堤边坡的位移响应,显著地减弱土体在地震作用下的破坏程度。在1/3坡高以后,加筋边坡加速度放大倍数都逐渐增大,且素土与加筋土加速度放大倍数差别开始变得显著,并在靠近路堤边坡顶部位置达到最大值。FLAC^(3D)数值模拟计算出来的轮胎加筋加速度放大倍数略小于振动台试验的结果。

Based on previous shaking table model ment effect of waste tires reinforced slopes are conducted test, the acceleration performance and reinforce- under seismic action through FLAC3D numerical simulation analysis＂ The results show that the waste tires can effectively block the transmission of seismic forces, reduce the acceleration magnification and displacement response of embankment slope andcan sig- nificantly reduce the damage extent of the soil under seismic action. Along the surface of the slope about 1/3 of the height, the difference of acceleration magnification between the waste tires reinforcement and pure sand slope becomes significant gradually with the increase of height, and the maximum difference reached on the top of the slopes. The acceleration magnification of FLAC3D numerical simulation analysis is slightly less than the shaking table test results.