辐射井是由竖直的集水井和水平的取水管组成的一种复合井型。即在大口竖井下部的井壁周围,穿透井壁打若干条水平孔,并下好滤水管材,形成辐射状的水平取水管,也叫辐射管。井周围含水层中的地下水,可以直接渗入这些辐射管,并集中流进大口竖井,供水泵提取。使取水范围扩大,出水量增加。这种井型已在北方不少省、市采用,特别是陕西省应用最广,效果也最显著。陕西省地处黄土高原,土质属大孔性土,容水度大,而透水性差。同时,黄土土层的垂直节理相当发育,存在着大量垂直向的裂隙、根管、溶孔等。水平渗透性能比垂直渗透性能更差。采用当地的筒井、管井等竖直井,出水量太小,往往抽抽停停,群众称为“一袋烟井”。而辐射井 Radiation wells are a composite well type consisting of a vertical water collection well and a horizontal water intake. That is, in the lower part of the large shaft shaft wall around the hole through the wall to play a number of horizontal holes, and the next good drainage pipe, the formation of radial horizontal water pipe, also known as the radiation tube. Groundwater in the aquifers surrounding the well can penetrate directly into these radiant tubes and concentrate into large mouth shafts for extraction by the pump. To expand the scope of water intake, water increased. This well type has been used in many provinces and municipalities in the north, especially in Shaanxi Province, the most widely used, the effect is most significant. Shaanxi Province is located in the Loess Plateau, soil is a large porous soil, water content, and poor water permeability. At the same time, the vertical joints of the loess soil are well developed, there are a large number of vertical cracks, root canal, dissolved pores and so on. Horizontal permeability is worse than vertical permeability. The use of local vertical wells, tube wells and other vertical wells, the water is too small, often pumping pumping stop, the masses called “a bag of smoke.” The radiation well