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农村有些地方打的压水井,往往遇旱时压不出水来。怎样使这些压水井出水量增多呢?在地下水位埋深不低于7～8米的地方,可采用压水井管外套砾石水泥井管的办法加以改造。也可以用这种办法打新井。采用外套砾石水泥管的办法,出水量可比普通压水井多30～50％。具体作法是: 1. 下砾石水泥井管:选取管径在50厘米左右的砾石水泥井管,根据压水井深要求,一般下管深不超过10米。砾石水泥管外壁铺设滤水层,滤水层厚10厘米左右,外层为粗砂,里层(贴近砾石水泥井管壁处)为砾石。
Some places in rural areas hit the pressure wells, often in case of pressure to the water. How to make these water pressure wells increased? In the groundwater depth of not less than 7 to 8 meters of place, can be pressurized water well casing gravel cement well tube way to be modified. You can also use this method to play a new well. The use of jacket gravel cement pipe approach, the amount of water can be more than ordinary pressure wells 30 to 50%. Specific practices are: 1. Gravel cement well tube: Select the diameter of 50 cm or so gravel cement well tube, according to the pressure well depth requirements, the general under the tube depth of not more than 10 meters. Gravel cement pipe laid on the outer wall of the drainage layer, drainage layer thickness of about 10 cm, the outer layer of coarse sand, the inner layer (close to the wall of gravel cement well) for the gravel.