基于天津市滨海新区于家堡金融区起步区一期特大型基坑群的特点,综合考虑开发进度、工期、造价及施工场地布置等方面的因素,对基坑群各地块的独立实施、合并实施等多套可选支护方案进行了深入的分析和比选。确定了在工期、造价及施工场地布置等各方面都比较均衡的支护方案和工况流程,可为软土地区类似特大型基坑群工程的支护方案选型提供借鉴和参考。 Based on the characteristics of the first large-scale foundation pit group in the start-up area of ​​Yujiapu financial district of Binhai New Area in Tianjin, considering the factors such as development schedule, construction period, construction cost and construction site layout, Combined implementation of multiple sets of optional support programs conducted in-depth analysis and comparison. It is confirmed that the balanced support schemes and working conditions and processes in terms of construction period, construction cost and construction site layout can provide reference and reference for the selection of supporting schemes for similar extra large excavation in soft soil area.