（1）检查井的定义：
(1) the definition of the inspection well:
检查井是用于雨污水排放管道的附属建筑，是便于定期检查和疏通管道、防止管道堵塞的必要设施。
The inspection well is a subsidiary building for the drainage pipe of the rain water. It is a necessary facility to check and dredge the pipe regularly and prevent the pipeline from clogging.
（2）检查井系统组成
(2) the composition of the inspection well system
1：排水用塑料检查井由井座、井筒、井盖或防护盖和检查井配件组成，其基本元素要符合相关产业的产品行业国家标准要求；
1: the plastic inspection well for drainage is made up of well seat, wellbore, manhole cover, protective cover and inspection well fittings. Its basic elements must conform to the requirements of relevant industry's product industry national standard.
2：设计、施工、验收和维护保养应符合CECS227:2007《建筑小区塑料排水检查井应用技术规程》
2: the design, construction, acceptance and maintenance should conform to CECS227:2007 "technical specification for the application of plastic drainage inspection well in building district"
（3）检查井应用领域
(3) application field of inspection well
检查井适用于建筑小区（居住区、科研院所、学校、厂区）、停车坪、绿地、道路、印染区污水排放、酸碱工业废水排放、医院及疾病控制区域、雨水收集等。
The inspection well is suitable for building district (residential area, Research Institute, school, factory area), parking lot, greenbelt, road, printing and dyeing area sewage discharge, acid and alkali industry wastewater discharge, hospital and disease control area, rainwater collection and so on.
（4）国内外应用情况
(4) the application situation at home and abroad
1、欧美、日本技术很成熟，市场占有率在80%以上；
1, Europe and the United States, Japanese technology is very mature, market share of more than 80%;
2、国外管道与井发展同步，我国配件滞后，标准不及时，影响检查井发展；
2, foreign pipeline and well development synchronization, China's accessories lag, the standard is not timely, affecting the development of inspection wells;
3、国内检查井应用处于推广阶段，投资空间较大。北方特别是西北开始推广应用。
3. The application of inspection wells in China is in the promotion stage, and the investment space is large. The north, especially in the northwest, began to popularize and apply.