目前,暗管排水已作为一种先进的排水工程措施,在许多国家得到广泛的推广和运用。苏联在沼泽、半沼泽地、洼地大力开辟暗管与明沟组合排水区。据1975年统计资料,全苏暗排面积已达7350万亩。美国为了减少工程维修费用,保证管道排水畅通,采用大口径波纹塑料管,施工机械化程度较高。暗管排水在欧洲已经代替了田间的明沟系统,塑料管代替了瓦管和混凝土管。我国在改进明沟排水的同时,对地下排水管道、滤料、施工技术和施工机具以及多种边界下 At present, underground pipe drainage has been widely used as a kind of advanced drainage engineering measures in many countries. The Soviet Union in the swamps, semi-marshland, depression to open up concealed pipe and open ditch drainage area. According to the statistics of 1975, the area of ​​Alluvial Soils reached 73.5 million mu. The United States in order to reduce the cost of construction and maintenance, to ensure smooth drainage pipes, corrugated plastic pipe with large diameter, high degree of construction mechanization. Vascular drainage has replaced the open ditch system in the field in Europe, plastic pipe instead of tile pipe and concrete pipe. In the meantime to improve the ditch drainage, the underground drainage pipes, filter media, construction technology and construction machinery and a variety of borders