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三、锅锥施工法锅锥施工法就是在拔掉一部分井管后,用锅锥钻泵坑,再下大直径钢筋混凝土管,最后加固泵坑底部。施工步骤如下:(一)拔井管钻坑之前,必须先拔掉一部分井管。1.确定拔管深度。拔管深度等于设计泵坑深度加上锅锥锥底的高度(见“锅锥安装示意图”中的“a”)。2.封闭井孔。为了防止在拔管和其它作业时泥沙淤埋井孔,拔管前用海带包或豆包,将井孔封闭好。封
Third, the pot cone construction method Pot cone construction method is to unplug a portion of the well, the pot taper drill pits, and then the large diameter reinforced concrete pipe, and finally strengthen the bottom of the pit. Construction steps are as follows: (A) before drilling well, you must first unplug a portion of well pipe. 1. Determine the extubation depth. Extubation depth is equal to the depth of the design pit plus the height of the conical bottom of the pan (see “a” in “Pan Cone Installation Sketch”). 2. Closed borehole. In order to prevent sediment silting when extubation and other operations, before extubation with kelp bag or bean bag, the hole closed well. seal