检查井是地下管道中重要的构筑物，对城市功能的发挥，环境保护和人民生活有着重要影响，但是，我国传统主要用粘土砖砌筑，用材和施工工艺都比较落后，砖砌检查井成为市政排污管道系统的一大质量薄弱点，延缓了管道施工技术的进步。无论是市政排水管还是住宅排水管,埋设一段 40m 长的管道,通常只需要几个小时,而砌一座砖砌检查井却需要2天。其中混凝土基础及养护起码要1天,砌井、抹面、做流槽又需要半天甚至一天,大型检查井甚至要2天以上。为了改变砖砌检查井缺点,近十多年来,一些城市进行了许多预制检查井的研制和推进工作，预制检查井是提高排水管道质盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门量水平的必由之路。
Inspection well is an important structure in the underground pipeline, which has an important impact on the play of urban functions, environmental protection and people's life. However, in China, clay bricks are mainly used as masonry materials and construction technology are relatively backward. Brick inspection well has become a major quality weakness of municipal sewage pipeline system, delaying the progress of pipeline construction technology. It usually takes only a few hours to bury a 40m long pipeline, whether it is a municipal drainage pipe or a residential drainage pipe, but it takes two days to build a brick inspection well. Among them, the concrete foundation and maintenance should be at least one day, the construction of well, plastering and launder will take half a day or even a day, and the large inspection well will even take more than two days. In order to change the shortcomings of brick inspection wells, in recent ten years, many prefabricated inspection wells have been developed and promoted in some cities. Prefabricated inspection wells are the only way to improve the quality level of drainage pipelines