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上海虹桥综合交通枢纽是一项综合性强、涉及面广的系统工程,西航站楼、东交通中心、车库、磁悬浮和地铁隧道及车站等单体的施工在平面、时间和空间上相互重叠、纵横交错。本工程基坑面积巨大、开挖深度超大、施工难度大,其基坑规模在上海地区乃至全国均属罕见,而且工程工期十分紧迫。设计紧扣基坑面积巨大、挖深深、地下空间布置错落高低相连,周边环境保护要求低等特点,经过多种基坑支护设计方案的技术、经济和工期的综合对比分析,最终采用多级梯次联合支护体系的设计方案。该方案的应用加快了基坑的施工速度,大幅度地节省了工程造价,取得了良好的社会和经济效益,为同类工程提供了一些借鉴。
Shanghai Hongqiao Integrated Transportation Hub is a comprehensive and extensive system engineering. The construction of single buildings such as West Terminal Building, East Traffic Center, garage, maglev and subway tunnels and stations overlap with each other in plan, time and space , Criss-cross. The project pit area is huge, excavation depth is large, construction is difficult, the scale of its foundation pit in Shanghai and even the whole country are rare, and the construction period is very urgent. The design is closely linked with the characteristics of huge foundation pit, deep excavation, underground space layout with scattered low level and low surrounding environment protection requirements. Through comprehensive comparative analysis of technology, economy and construction period of various pit support design schemes, Design Scheme of Combined Support System of Step Echelon. The application of this program has accelerated the construction speed of foundation pit, greatly saved project cost, achieved good social and economic benefits and provided some references for similar projects.