某邻近地铁的基坑工程围护设计与分析

Design and Analysis on Engineering Enclosure of Foundation Pit Adjacent to Metro

基坑周边邻近地铁隧道,环境保护要求较高。现介绍某基坑工程针对地铁隧道保护所采取的分区开挖方式,在离地铁较近区域控制单块开挖面积,并采用灌注桩围护,从而对地铁影响较小。对比分析了数值模拟与工程实测数据,结果较为接近,基坑开挖对周边环境的影响满足规范要求。采用此基坑围护设计在保护周边地铁的基坑工程实践中取得了良好的实施效果,可供同类工程借鉴和参考。

The environmental protection is higher required for a foundation pit adjacent to a metro tunnel. This paper introduces the subarea excavation method of a foundation pit used for the protection of metro tunnel. The single-block excavation area is controlled in a place near the metro, and the cast-in-place pile enclosure is used so as to decrease the influence on the metro. The numerical simulation data and the engineering measured data are compared and analyzed. The results are closer. The influence of foundation pit excavation on the surrounding environment meets the standard requirements. The design of foundation pit enclosure has achieved the good implementation effect in the foundation pit engineering practice of protecting the surrounding metro, which can be referred for the similar projects.