交通载荷下高峪铺公铁立交桥挡土墙失稳模拟

Instability Simulation of Retaining Walls vnder Vehicles Loading Condition on Gaoyupu Crossroad

根据公路路面弯沉的特性 ,建立车辆载荷下挡土墙系统的动载平衡方程 ,并利用有限差分法进行分析。结果表明 ,在车辆载荷作用下 ,高峪铺公铁立交桥挡土墙最易出现的破坏方式是顶部外张 ,公路基础的潜在破裂面与水平方向呈 40～ 45°角。

Based on the characteristics of the road surface, a dynamic equilibrium equation of the retaining wall under the vehicles loading condition in the Gaoyupu Crossroad is established and analyzed by means of the explicit finite difference method By the results, the principle stress is concentrated in the bottom and top positions of retaining wall, and the displacement velocity, displacement in the top position are greater than other positions, so probable instability of the retaining wall road system is the outside opening in the top of the retaining wall, the slipping angle of the potential fracture wedge of earth foundation is 40～45°