富水地层地铁车站深基坑降水设计方案探究

Research on the Design Scheme of Deep Foundation Pit Dewatering for Metro Station in Water-rich Stratum

本文以兖州南站预留二期轨道交通一号线地铁车站主体深基坑降水设计成果为例,总结已建地铁车站施工经验,开展富水地层深基坑降水设计方案技术研究。通过深基坑降水重难点分析,建立渗流数值模型模拟降水对周边地下水位、土体沉降等的影响,并提出整套深基坑降水设计方案,保证深基坑开挖、支护施工过程安全,确保深基坑边坡稳定,为类似工程建设提供宝贵经验。

This paper takes the dewatering design results of the main deep foundation pit of the Metro Line 1 subway station reserved for the second phase of the Yanzhou South Station as an example,summarizes the construction experience of the built subway station,and carries out technical research on the dewatering design scheme of the deep foundation pit in the water-rich stratum.By analyzing the important and difficult points of deep foundation pit dewatering,a seepage numerical model is established to simulate the impact of dewatering on the surrounding groundwater level,soil settlement,etc.,and a complete set of deep foundation pit dewatering design plans is proposed to ensure the safety of deep foundation pit excavation and support construction,as well as the stability of deep foundation pit slope.It provides valuable experience for the construction of similar projects.