Method for removing sediments under sewage water in a sewer

摘要

A method for removing sediments under sewage water in a sewer includes: introducing a portion of a cable into a sewer from the ground by extending the cable into the sewer through an inlet in the ground accessible to the sewer and out of the sewer through an outlet in the ground communicated with the sewer; lowering the portion of the cable until the portion of the cable is embedded in the sediments; positioning two ends of the cable extending outwardly of the inlet and the outlet on the ground; moving mechanically the cable to stir and suspend the sediments into the sewage water; pumping the suspended sediments from the sewer to the ground through one of the inlet and the outlet; removing the sediments from the sewage water by filtration on the ground; and returning the sewage water to the sewer through the other one of the inlet and the outlet.