杭海城际铁路某车站基坑临近天桥结构段设计及施工关键技术分析

The design and construction key technologies for a metro station pit near an overbridge in the construction of HANGHAI intercity railway

随着城市地铁建设的快速发展,越来越多的车站基坑距离既有建(构)筑物非常近,不仅其施工条件受到限制,而且基坑开挖也会对临近建筑物产生不利影响。如果技术保护措施不当,严重者甚至会威胁到建筑物的安全。本文基于某下穿天桥结构的地铁车站基坑工程,通过一系列设计、施工关键技术措施,有效的控制了上部天桥结构变形量,顺利完成了基坑及车站主体的结构施工。本工程的成功实施可为今后类似项目的设计、施工提供经验参考。

With the rapid development of urban subway construction,more and more metro stations are built near the existing building.Not only the construction condition is restricted,but also the excavation will be harmful to adjacent buildings.If improper technology protection measures were taken,the existing buildings will be damaged by the construction.In this paper,an example for the protection of the overbirdge near a subway station pit is given.By a series of design and construction key technical measures,the deformation of the overbridge was very small during the excavation and the metro station was completed successfully.This project can provide good experience for the design and construction of similar cases in the future.