某邻近地铁深基坑工程变形实测分析

Analysis on Deformation of Deep Foundation Pit Project nearby Subway

上海某历史建筑物紧邻深基坑工程,通过对历史建筑采取有效的保护措施,包括采用了新型组合桩对老建筑进行全面的基础托换加固、邻近深基坑工程采用与主体地下结构相结合的支护方案,并对历史建筑沉降整个工程施工全过程的监测。结果表明周边历史建筑的沉降,在基坑开挖阶段得到了有效的控制。监测结果也表明地下墙施工阶段引起的沉降量也是不容忽视的。对于紧邻深基坑的历史建筑的保护措施和监测的成功经验可为类似工程提供有益的参考。

A historical building in Shanghai is closely adjacent to a deep foundation pit project. The effective protection measures are taken to the historical building including the use of a new type of composite pile for the comprehensive base shift reinforcement of the old building. The supporting scheme combined with the adjacent deep foundation pit project and the main underground structure is used. The settlement of the historical building is monitored in the whole engineering construction. The result shows that the settlement of the surrounding historic buildings has been effectively controlled in the excavation stage of the foundation pit. The monitoring result also shows that the settlement caused in the construction stage of underground diaphragm wall is not to be ignored. The successful experience of protection measures and monitoring of historical buildings close to the deep foundation pit can provide a useful reference for the similar projects.