1) Underwater blocking of rain and sewage pipes

First of all, the toxic and harmful gases such as hydrogen sulfide in the current rain and sewage pipes are detected, and the well can be operated within the normal value. Well operators must wear diving suits, wear breathing apparatus, oxygen pipe, tie safety rope, and use air compressor to supply air into the pipeline to inject fresh air. Under the condition of continuous air supply, divers go into the water to clean up the silt in the original pipeline, and the water personnel lift the inflatable rubber plug one by one according to the signal instructions of the diver. After the underwater personnel push and seal, the water personnel inflate the inflatable rubber plug.

2) Rainwater and sewage pipes are blocked and removed underwater

After the completion and acceptance of the rainwater and sewage pipelines, the temporary underwater heads in the original reserved branch pipes should be removed before being put into use.

First of all, the operator must wear a diving suit, wear a breathing apparatus, oxygen pipe, tie a safety rope, and use an air compressor to supply air into the pipeline to inject fresh air. Under the condition of continuous air supply, divers go down the well to remove the head. First, remove the upper wall to reduce the tightness of the wall, and then remove the middle and lower walls one by one, and then lift the demolition objects, and finally clean the construction site and open the rain and sewage pipes. Pipe plug removal (underwater wall removal)