下水道检查井筒的预制早在五十年代已在新工程中开始应用,此外在雨水口的预制安装中也作了大量的工作,但由于施工技术装备以及老习惯的关系迄未大量推广应用。而今由养护方面思想开拓旧话重提,是一件可喜的现象但希望今后应坚持发展大力推广使用,在国外已是成熟的工作,对今后城市排水建设加速发展是有一定促进的。 The prefabrication of the sewer inspection wellbore has been applied in the new project as early as the 1950s. In addition, a large amount of work has also been done in the prefabricated installation of the gully, but it has not been widely applied due to the relationship between construction technology and equipment and old habits. It is a gratifying phenomenon to reopen the old words from the perspective of conservation. However, we hope to stick to the development and promote the use in the future. It is a mature work in foreign countries and will certainly promote the acceleration of urban drainage construction in the future.