顶管施工对邻近地铁桥梁的扰动影响

Influence of Pipe Jacking Construction on Adjacent Metro Bridges

摘要: 城市中进行顶管施工时常会出现靠近或侧穿邻近桥梁桩基等情况，可能会对桥台造成一定程度的扰动影响。本文以深圳固戍水质净化厂二期工程配水管项目为依托，通过ABAQUS分析了接收井下沉施工和人工顶管的顶进施工对邻近地铁高架桥台的扰动影响规律。分析认为相比于浇筑过程，接收井的下沉施工对邻近桥台的扰动影响更大，并随着下沉深度的增加和距桥台距离的减小而逐渐增大。人工顶管顶进过程对邻近桥台的扰动影响较大，且扰动程度随着距桥台距离的减小而显著增大，最大可对邻近桥台产生约0.85 mm的沉降影响。

Abstract: Pipe Jacking Construction in the city often appears to be close to or side through the adjacent bridge pile foundation, which may cause certain disturbance to the abutment. Based on the water distribution project of Shenzhen Gushu sewage treatment plant phase II project, this paper analyzes the influence of the subsidence construction of the receiving shaft and the jacking construction of the artificial pipe jacking on the adjacent subway viaduct abutment through ABAQUS. The analysis shows that compared with the pouring process, the influence of the sinking construction of the receiving shaft on the adjacent abutment is greater, and it gradually increases with the increase of the sinking depth and the decrease of the distance from the abutment. The disturbance of adjacent abutments is greatly affected by the process of artificial pipe jacking, which increases significantly with the decrease of the distance from the abutment. The maximum settlement impact on adjacent abutment is about 0.85 mm.