开槽放坡法在地铁深基坑施工中的应用

Application of Slotting and Grading in the Construction of Deep Excavation of Subway

地铁车站常用长臂挖掘机基坑施工方案,受机械荷载的影响,施工安全存在较大风险,并且场地有限,不能存土,也不便于材料的储运和灵活周转。本工程结合槐安桥站工程特点,提出一种开槽放坡出土方案,实行流水作业,节省了场地面积和材料储存和周转的空间,加快了施工进度,同时大幅度降低了施工成本,提高了施工效益。

The common construction scheme of long arm excavator foundation pit in the subway station is influenced by the mechanical load. There is a big risk of construction safety, and the space is limited, it can＇t deposit soil, and it＇s not easy for the transportation and flexible material flow of the facilitate storage. Combined with the engineering characteristics of Huaian Bridge Station, this project puts forward an unearthed scheme of slotting and grading, and carries out practice routine. It saves the space of ground area and materials storage and turnover, speeds up the construction progress, at the same time, it greatly reduces the construction cost and improves the construction efficiency.