地铁车站深基坑施工中的变形监测研究

Study and monitoring on deformation during deep foundation pit construction for subway station

为了解决深基坑在施工过程中发生变形,严重会导致工程事故发生的问题,采用了现场实例方法,以广州地铁六号线东湖站基坑工程为例,描述了该车站基坑开挖的变形监测过程,并结合工程现场施工情况对监测数据进行了研究分析.结果表明,监测施工过程中基坑连续墙及支撑结构、支撑轴力、立柱、地下水位、周边建筑(构)物等项目的变形情况对工程安全施工具有重要作用.在施工过程中根据变形监测的结果,随时调整施工参数,优化设计并采取相应的处理措施,确保后续施工能够安全顺利地完成,为安全生产提供有力保障.

In order to solve the deformation problem of deep foundation pit during construction,which could result in accidents,this study investigates the deformation of deep foundation pit.Using East Lake station foundation pit project of Guangzhou metro line six as an example,this paper describes the excavation deformation monitoring process for station foundation pit.In addition,based on the construction site,the study analyses the monitoring data.The results show that during the construction,the deformation monitoring on foundation pit diaphragm wall and supporting structures,supporting axial force,column,underground water level,surrounding buildings(structures) are of significance for the construction project.Based on the deformation monitoring results,the construction parameters can be adjusted accordingly.On the other hand,the optimum design and corresponding measures can be taken to ensure the follow-up construction be safely and successfully completed.