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Plastic inspection wells, commonly known as plastic "manholes", are set at the intersection of plastic drainage pipes, the turn, the change of pipe diameter or slope, the place where the water falls or the straight pipe section at a certain distance, which is convenient for regular inspection, cleaning and dredging. The drainage accessory structure of the pipeline.

Plastic inspection wells are composed of wellbore, wellbore, manhole cover and plastic inspection well spare parts. The inspection well wellbore can use buried drainage pipes, such as PVC-U double-layer axial hollow pipe, HDPE hollow winding pipe, etc.

According to the number of connections and angles, there are starting well seats, straight well seats, three-way well seats, four-way well seats, 90-degree elbow well seats, etc. In order to adapt to various drainage conditions, plastic inspection wells are also equipped with inner and outer diameter transfer joints, saddle joints, variable diameter joints, confluence joints, variable angle joints and other matching plastic inspection well spare parts. These spare parts and the well seat are used together to ensure the fluidity and tightness of the entire drainage system.

The inspection well cover can be made of cast iron inspection well cover, composite material inspection well cover, and steel fiber reinforced concrete inspection well cover. The quality meets the requirements of the current "Plastic Inspection Wells for Drainage in Building Areas" CJ/T233-2006. The color is white or gray, and the inner and outer walls of the wellbore should be smooth and flat. The surface should not have bubbles, cracks, depressions, uneven color and decomposition discoloration lines. The plastic wellbore wellbore seat has no cracking or cracks under 15KN static load pressure.

Scope of application of plastic inspection wells

1) Plastic drainage inspection wells with buried plastic drainage pipes with an outer diameter of not more than 1200mm and a buried depth of not more than 8m in building communities (residential areas, public building areas, factories, etc.), urban and rural municipalities, industrial parks, and old city renovation. Design, construction and maintenance.

2) Construction of plastic drainage inspection wells under the conditions of general soil, soft soil, seasonal frozen soil and collapsible loess soil.

3) Seismic fortification cracks are 9 degrees and below.

4) The ground load of the general lane is designed according to the total weight of the vehicle 15t (rear wheel pressure 5t); the ground load of the fire lane is designed according to the total weight of the vehicle 30t (rear wheel pressure 6t).

5) The groundwater level is designed to be no higher than 1.0m below the ground.