安徽省涡阳县根据多年打井实践,创造了一种新的井型——大骨料井,对平原浅层地下水的开采利用有明显效果。现简介如下。一、大骨料井制管与井型结构。①制管:分实管与滤水管两种。实管采用灰石比为1:3.5,标号要达到100。滤水管为无砂混 Guoyang County, Anhui Province, according to years of drilling practice, has created a new well type - large aggregate wells, plain shallow groundwater exploitation and utilization have obvious effects. Now the introduction is as follows. First, the big aggregate well tube and well type structure. ① pipe system: sub-real pipe and drainage pipe two. In fact, the use of limestone ratio of 1: 3.5, marking to reach 100. Filter for non-sand mixed