Analysis of existed railway bridge foundation deformation influenced by foundation pit excavation
With the rapidly improvement of the road network,the projects across the railway or under the railway are gradually increasing.Due to the high standard of the railway design and the strict requirements for track regularity,it is necessary to take full account of the disturbance of the pit excavation to the foundation of the adjacent railway bridge,especially the displacement of the railway bridge foundation.The displacement should be kept within a minimum range,in order to avoid affecting the safety and comfort of railway operation.This article takes the interchange overpass of Xi Baipo highway project as an example,the construction process of the excavation of the foundation pit of the bridge is simulated by using the finite element software,and the influence of the foundation pit excavation on the displacement of the existing railway bridge is analyzed.The displacement of railway bridge foundation caused by the construction of protective piles and foundation excavation is calculated separately.The analysis shows that the foundation pit excavation of the bridge has little influence on the displacement of the existing railway bridge foundation,and the maximum value of the railway foundation variation is less than 2mm,and the design of the protective pile can meet the safety requirements of the railway bridge operation.
Pit excavation railway bridge finite element ground stress balance foundation deformation
WANG Fei
CHINA Railway Design Corporation,Tianjin,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1465-1473
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）