复杂环境下城市地铁深基坑开挖实测与分析

Monitoring and Analysis of Deep Excavation of Subway in Complicated Environment

城市地铁施工中由于周边环境复杂,基坑开挖引起的土层扰动,可能会造成建筑物及地下管线破坏,甚至引起基坑失稳。以深圳地铁中心公园停车场深基坑工程为例,介绍了该基坑工程的设计与施工,讨论了基坑开挖监测方案,并结合施工中出现的问题,对现场监测结果进行了分析和总结。结果表明,在复杂环境下进行基坑开挖工程,选用合理的监测方案,对基坑开挖过程中周边环境及支护结构进行实时动态控制,确保了支护结构及周边环境的安全。

Because of the complexity of ambience, in the construction of city subway, foundation pit excavation can cause disturbance to the soil, and bring damage to the building and underground pipe, even the stability of foundation pit can be lost. Based on the project of Shenzhen metro, introduced the design and construction of the deep foundation pit, discussed the monitoring scheme of foundation pit excavation, also analyzed and summarized the monitoring result. Project example shows that choosing reasonable monitoring scheme and carrying out real-time dynamic control to environment and retaining structure ensured the safety of the excavation process.