Construction method of deep foundation pit dewatering wells: Fid-Bau Portal

Construction method of deep foundation pit dewatering wells

LI LIN / YANG YANG / QIU CHANGLIN

The invention discloses a construction method of deep foundation pit dewatering wells. The construction method comprises the following steps that a deep foundation pit dewatering well construction scheme is formulated according to construction site soil texture and site area; setting out is performed to mark the position of each dewatering well; water filter pipes and inner filter cartridges are manufactured, the inner filter cartridges are placed in the water filter pipes, and the water filter pipes comprise reinforcement cages, first filter cartridges and second filter cartridges, the firstfilter cartridges and the second filter cartridges are sequentially installed on the reinforcement cages; well drilling is performed to excavate rotary excavating wells, and the water filter pipes andthe inner filter cartridges are sequentially hoisted into the rotary excavating wells; dewatering pumps are installed and water is pumped for well washing until the water and sand are clean; a foundation pit is excavated, and all the water filter pipes are pulled out after the foundation pit is excavated to a set position; and capping is performed. The construction method of the deep foundation pit dewatering wells has the advantages that the water filtering effect is good, the manufacturing cost is low, and construction is convenient.

本发明公开了一种深基坑降水井施工方法，包括如下步骤：根据施工场地的土质和场地面积制定深基坑降水井施工方案；放线标示各个降水井位置；制作滤水管和内滤筒，所述内滤筒置于滤水管内，所述滤水管包括钢筋笼和依次安装在钢筋笼上的第一过滤筒和第二过滤筒；钻井开挖旋挖井，并依次吊放滤水管和内滤筒到旋挖井内；安装排水泵并抽水洗井，直至水清砂净；开挖基坑，并在基坑开挖到设定位置后拔出各个滤水管；封井。本发明得到的深基坑降水井施工方法滤水效果好、制作成本低，施工方便。

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