论文部分内容阅读
由于小口径农灌井(简称小口井)过水断面小,因而其滤水结构必须具有透水性好和不易淤堵的特性。而如何使小口井的滤水结构具有上述特性,则是值得研究的问题。本文以室内和成井试验结果为依据,提出了采用经过优选的无砂混凝土滤水管(简称无砂管)及围填滤料的滤水结构形式。使用该种滤水结构不仅可提高井的出水量,而且会延长井的使用寿命。
As the small-diameter agricultural irrigation wells (referred to as small wells) have a small cross-section of water, their drainage structures must have good water permeability and do not easily clog. How to make the drainage structure of a small well have the above characteristics is worth studying. Based on the indoor and well test results, this paper proposes a water filtration structure using a preferred sand-free concrete filter pipe (abbreviated as sand-free pipe) and surrounding filter media. The use of this type of water filtration structure can not only increase the water output from the well, but also prolong the service life of the well.