原因1：目前的道路工程及管线工程的施工规范中没有铸铁检查井井盖安装的标准工艺，安装方法多种多样。
Reason 1: There is no standard technology for the installation of cast iron inspection well cover in the current construction specifications of road and pipeline engineering, and the installation methods are various.
原因2：操作工人在井盖安装施工往往独立作业，有较强的随意性。
Reason 2: Operators often work independently in the installation and construction of the well cover, which has a strong randomness.
原因3：安装过程中，缺少检查监督环节；安装完成后，质量不易检查，有无隐患不易判断。
Reason 3: Installation process, the lack of inspection and supervision links; after installation, the quality is not easy to check, whether there are hidden dangers is not easy to judge.
原因4：有不少施工单位不清楚排水框格护坡模具 箱体护坡模具 华尔街铜牛 电阻柜 接地电阻柜 电缆保护接地箱 隔离墩模具 化粪池模具规范的井盖安装规定.
Reason 4: Many construction units are not clear about the drainage code for the installation of well covers.
结论：缺乏一个统一的、科学的、合理的铸铁检查井井盖标准安装工艺是产生检查井井盖安装缺陷的根本原因。
CONCLUSION: Lack of a unified, scientific and reasonable standard installation process of cast iron inspection well cover is the fundamental reason for the defects in the installation of inspection well cover