地铁车站深基坑拉槽分层开挖稳定性分析

针对地铁车站基坑开挖体量大、施工空间狭小、施工工序繁多,传统基坑开挖方法效率低的问题,提出拉槽分层开挖方法.结合乌鲁木齐地铁 1 号线某车站施工,采用数值模拟计算方法对比分析拉槽分层开挖方法与传统基坑开挖方法在施工过程中的基坑的稳定性,说明拉槽分层开挖方法的可行性.同时,结合该车站施工现场监测结果对拉槽分层开挖方法进行验证.结果表明:拉槽分层开挖方法可以保证车站基坑开挖的稳定性,且在施工组织管理和施工效率方面优势明显,可为类似工程提供参考.

Analysis on Stability of Deep Foundation Pit by Groove Layered Excavation in Metro Station

In order to solve the problems of foundation pit large excavation volume, narrow construction space and various construction procedures in metro station and the low efficiency of traditional excavation, the groove layered excavation method is put forward. Combined with the construction of a station in Urumqi Metro Line 1, the stability of the foundation pit in the construction process of the groove layered excavation method and the traditional foundation pit excavation method is compared and analyzed by the numerical simulation calculation method, and the feasibility of the groove layered excavation method is illustrated. Combined with the monitoring results of the construction site of the station, the groove layered excavation method is verified. The results show that the groove layered excavation method can ensure the stability of station foundation pit exca-vation with obvious advantages in construction organization management and construction efficiency, which can provide reference for similar projects.