据有关部门估计,我国每年打供水管井约20～30百个,每年报废的管井约10～15万个。因此延长管井的使用年限,对于节约资金是具有重要意义的,特别是在细颗粒含水层中的管井,往往由于使用、维护不当,常出现涌砂现象,使井提前报废,现仅就这个问题谈谈个人的粗浅看法。 According to the estimation of the relevant departments, the number of water supply tube wells in China is about 20 to 30, and the number of tube wells that are scrapped every year is about 10 to 150,000. Therefore, extending the useful life of tube wells is of great significance for saving funds. In particular, wells in fine-particle aquifers are often due to improper use and maintenance. The phenomenon of gushing often occurs and the wells are scrapped ahead of time. Talk about the superficial view of the individual.