Manhole covers are drainage facilities used to cover surfaces such as roads, streets, and sidewalks, commonly employed to collect and discharge rainwater and wastewater. The primary function of manhole covers is to prevent pedestrians and vehicles from falling into the storm drain and to ensure smooth water flow. They are typically made of cast iron, steel plates, concrete, and come in rectangular or circular shapes.

The dimensions, thickness, and load-bearing capacity parameters are designed and manufactured based on the requirements of the application. In addition to drainage and protection functions, the manhole cover features aesthetics, anti-slip, corrosion-resistant, and wear-resistant qualities.

In urban construction and road maintenance, manhole covers are widely used. However, there are some issues with manhole covers, such as displacement, damage, and lack of safety measures, which could pose safety hazards to pedestrians and vehicles. Therefore, strict supervision and management of the installation and maintenance of manhole covers are essential to ensure public safety.