关键词: 公路桥梁, 采动损害, 地表剩余移动变形, 采空区稳定性, 概率积分法, 地基稳定性

Abstract: In view of the impact of mining on the Ma-jia-shi-pan-gou Bridge, the two aspects of surface movement deformation and foundation stability are analyzed. According to the observation data of the bridge's moving deformation, combined with the bridge structure and the geological mining conditions of the mining area, the law of surface movement and deformation of the goaf is analyzed. On this basis, combined with the analysis of the damage status of the bridge, the probability integral prediction simulation method is applied to simulate the expected impact of the residual movement deformation of the mining surface on the bridge, and the influence degree of the mining on the bridge is determined to be within the I-level range. Aiming at the stability of the foundation of the bridge, using the combination of traditional analysis and FLAC 3D, it is determined that the undercut goaf of the bridge is in a basically stable state. and the research results can be used as the basis for the later repair of the bridge.