地铁车站明挖基坑下穿互通立交桥基础的施工关键技术及变形影响分析

Key construction technology and deformation influence analysis of subway station open cut foundation pit underpass interchange foundation

本文以佛山市轨道交通二号线某地铁车站明挖基坑下穿互通立交桥墩基础的深基坑工程为背景,介绍了下穿互通立交桥墩基础的深基坑工程施工关键技术,对该工况下深基坑设计及施工提供了一种有效的解决方案;利用三维有限元软件分析了采用托换技术施工时深基坑施工对互通立交桥墩的变形影响,经有限元计算分析与施工后监测情况印证该施工技术及措施能满足工程保护要求。

Based on the deep foundation pit project of a subway station of Foshan Rail Transit Line 2,this paper introduces the key construction technology of deep foundation pit project of Underpass overpass pier foundation,and provides an effective solution for the design and construction of deep foundation pit under this working condition.The paper analyzes the deformation effect of deep foundation pit with underpinning technology by using three-dimensional finite element software,which proves that the construction technology and measures can meet the requirements of engineering protection.