Subsidence Displacement Analysis of Bridge Pier under Approaching Excavation Load

[摘要] Based on the finite element model of approaching excavation of foundation pit, the influence laws of excavation depth and distance on the bridge pier deformation are studied. The results show that subsidence displacement of the bridge pier increases with the increasing of the approaching excavation depth. The axial force of the steel pipe near the bridge pier is greater than that far away from the bridge pier. The influence of approaching excavation distance on foundation pit decreases with the approaching excavation distance increasing. The maximum sedimentation deformation appears at the location of 0.5B (B is the lateral width of the pier). When the approaching excavation distance is less than 1B, sedimentation deformation of the pier is dangerous. When the approaching excavation distance is greater than 1B, sedimentation deformation of the pier is safe.

[发布机构] Institute of Crustal Dynamics, China Earthquake Administration, No.1 Anning zhuang Road, Haidian District, Beijing; 100085, China^1

[效力级别] 经济学

[关键词] Axial forces;Displacement analysis;Foundation pits;Influence laws