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排水减压井的井管多采用钢管、铸铁管、木管、石棉水泥管、钢筋混凝土管和砾石透水管等作为过滤器.这些井管虽然各有所长,但不是造价高,就是开孔率小,或是加工困难,不能令人十分满意.近年来开始采用聚氯乙烯塑料管作为减压井的井管,以降低造价,方便井管加工成型.目前,在供水工程中已广泛应用,但水利工程上应用还不多.我省北江大堤加固工程大塘段的减压井曾采用了聚氯乙烯塑料井管, 取得了一定的施工经验.
Drainage relief well tubular often use steel pipe, cast iron pipe, wood, asbestos cement pipe, reinforced concrete pipe and gravel aqueduct, etc. Although these wells have their own advantages, but not costly, is the hole rate Small, or processing difficulties, can not be very satisfied. In recent years began to use polyvinyl chloride plastic pipe as a relief well tube, in order to reduce costs and facilitate the well tube processing molding. At present, the water supply project has been widely used, But the hydraulic engineering application is not much .BeiJiang province Beijiang levee reinforcement project Datang paragraph decompression wells have used PVC plastic well tube, made some construction experience.