以温州市域铁路S1线一期工程为实例,分析了深厚软土地层基坑围护结构发设计原则、围护结构形式、建筑材料选取,结构计算的模型、参数、工况及计算结果,围护结构配筋、支撑轴力施加。实践表明,本工程基坑采用地下连续墙加多道钢筋混凝土支撑、钢管支撑的围护形式,设计方案合理,可为类似工程提供参考。 Taking the first phase project of Wenzhou Line Railway S1 as an example, this paper analyzes the design principles, envelope structure, construction materials selection, structural calculation model, parameters, working conditions and calculation results of foundation pit retaining structure in deep soft soil strata, Support structure reinforcement, support axial force applied. The practice shows that the underground continuous wall with multi-channel reinforced concrete support and the steel pipe support enclosure form are adopted for the foundation pit of this project. The design scheme is reasonable and can provide reference for similar projects.