列车荷载对衡重式挡土墙土压力及稳定性影响研究

利用FLAC-3D建立起三维有限差分衡重式挡土墙模型,研究分析了在墙后填土自重荷载和列车动荷载作用下,挡土墙墙背土压力变化规律,并分析了挡土墙水平作用力、抗滑和抗倾覆稳定系数随车速的变化规律。结果表明:荷载对挡土墙的影响主要集中在上墙的中下部,车速对水平土压力作用点位置以及挡土墙稳定性影响不大。

Influence Study of Train Load on Balance Weight Retaining Wall Pressure and Stability

Three-dimensional finite difference model of balance weight retaining wall is established using FLAC-3D.The law of soil pressure on the back of retaining wall under backfilling gravity load and dynamic train load is studied and the law of retaining wall horizontal force and stability factor against slide and overturn with train speed is analyzed.The result shows that load influence mainly concentrates in the middle and lower part of upper wall;train speed has little influence on the position of horizontal pressure point and retaining wall stability.