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农业部下达的由北京农业工程大学承担的“农用机(电)水井滤水机构所用土工织物的研制”课题于1989年4月在北京通过技术鉴定。目前我国农用机(电)井数量很大,据1984年统计,全国共有280万眼,因滤水结构产生涌砂或阻塞的就有14眼,造成经济损失4亿元。该课题组在我国首次将工土织物引入水井工程,进行了系统的实验、研究和现场考核。根据天然含水砂层的具体情况,确定了水井工程用的土工织物的设计准则,并对产品提出了规格化、系统化的要求,供用户选择。采用土工织物作为滤层与常规采用的棕皮包裹作为滤水材料相比,具有施工简单,易于保证质量和寿命长、省工、省料等优点,每 m~2滤层材料可省80元,同时使水井寿命提高3～5倍,具有较大的经济与社会效益。
The “Research and Development of Geotextiles for Agricultural Machinery (Electric) Water Well Drainage Mechanism” undertaken by the Ministry of Agriculture, undertaken by Beijing Agricultural Engineering University, passed the technical appraisal in Beijing in April 1989. At present, there are a large number of agricultural machinery (electric) wells in our country. According to the statistics of 1984, there are 2.8 million eyes in the country. There are 14 eyes resulting in sand production or clogging in the drainage structure, resulting in an economic loss of 400 million yuan. The research group in our country for the first time to introduce soil and water fabric engineering, conducted a systematic experiment, research and on-site examination. According to the specific situation of natural water-bearing sand layer, the design criteria of geotextile used in water well engineering are determined, and the products are standardized and systematical for users to choose. Geotextiles as the filter layer and the conventional use of the brown package as a drainage material compared with the simple construction, easy to ensure quality and long life, labor-saving, material saving, etc., each m ~ 2 filter material can save 80 yuan , While increasing the life of wells 3 to 5 times, with greater economic and social benefits.