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这种透水管既节省钢筋、铁丝,又保证了水泥管的泵压强度,不缠棕皮也可以防砂,渗透效能较好。用这种管打井,造价低,生产工艺简单,便于土法生产。材料:每管用水泥(400～500(?))17公斤,河卵石(直径5～10毫米)68公斤,中砂10公斤。用材比例:灰水比1∶0.36.灰石比1∶4,灰砂比1∶3,加工:人工搅拌,人工捣固,必须掌握好用材比例,过干,不坚实;过稀,影响透水性能。
This type of water-permeable pipe not only saves steel bars and iron wires, but also guarantees the pumping strength of the cement pipes. It can also prevent sand without wrapping brown leather and has good permeation performance. Drilling wells with this kind of pipe has a low cost, simple production process, and easy production by soil method. Materials: Each tube uses cement (400 to 500 (?)) 17 kg, river pebbles (diameter 5 to 10 mm) 68 kg, medium sand 10 kg. Material ratio: gray water ratio 1:0.36. limestone ratio 1:4, lime sand ratio 1:3, processing: artificial mixing, artificial tamping, must master the proportion of materials, too dry, not solid; too thin, affect Water permeability.