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某广场总面积10000m2,分A,B两个区,由于在A区有地下商城和变电所、水泵房、制冷及热交换站等机械用房,所以地下为二层,深度为-11.080m,需进行土方开挖支护、降排水工程以及基坑外围采用地下止水帷幕施工。为减少对该工程外围的住宅区、市政道路的影响和保护地下水资源,在基坑支护桩的外侧7m处,设止水帷幕挡墙以保证新建工程降水,不影响止水帷幕以外的建筑与市政设施等。
A square total area of 10000m2, points A, B two areas, as in the A zone underground mall and substation, pump room, refrigeration and heat exchange stations and other mechanical space, so the ground floor for the second floor, a depth of -11.080m , Need earth excavation support, water drainage project and the use of underground water curtain construction outside the pit. In order to reduce the impact on residential areas and municipal roads outside the project and to protect groundwater resources, a curtain wall at the outside 7m outside the foundation pit retaining pile shall be provided to ensure the precipitation of new construction without affecting the construction beyond the curtain wall And municipal facilities.