珠海地铁横琴站软土深基坑的变形分析

Deformation Analysis of Deep Foundation Pit in Soft Soil at Hengqin Station of Zhuhai Subway

以珠海城际轨道交通工程横琴站基坑施工为背景,对基坑开挖到顶板浇筑完成的整个过程进行实时监测,重点分析研究轨道交通车站深基坑的围护墙位移变形、支撑轴力等随基坑挖深和时间的变化规律,并对比了同一基坑,不同里程段,不同支护形式下的基坑变形特点,探讨了基坑变形过大的因素以及控制变形的措施和建议。

Relying on the foundation pit construction at Hengqin Station of Zhuhai intercity MRT,real-time monitoring was carried out in the whole process from excavation to roof pouring and the retaining wall for the deep foundation pit at the MRT station was paid attention to analyze the rule of its displacement deformation and supporting axial force changing with the excavation depth and time;furthermore,the deformation characteristics at the same pit in different mileage sections and different supporting forms were compared,and the factors leading to excessive deformation of foundation pit with the control measures and suggestions were discussed.