二期工程基坑一次性排水施工

Dewatering at One Time from Foundation Pit of Phase-Ⅱ Works

二期基坑排水是二期主体工程干地施工的保证，基坑一次性排水分为限制性排水和初期排水两个阶段。在施工过程中．精心组织，精心施工，敢于突破传统工艺．采用了立管一次就位和水泵直接串联等新方法，确保了基坑提前完成抽水任务。

The dewatering from the foundaton pit enclosed by the phase - II cofferdams is theguarantee of construction of the phase - II main works in dry condition. The dewatering at one timefrom the foundation pit was performed in two stages, i. e., the limited dewatering and initial dewatering. The dewatering was completed ahead of the schedule by elaborate organization and construction, breaking through traditional construction procedures, and taking the new measures including shaft pipes being installed in place at one time and directly connecting water pumps in series.[