Method of Gravity-Flowing Sewage Network Drainage as a Way to Increase its Durability and Maintainability

Abstract

High-quality maintenance extends the service life of costly pass-through collectors. Maintenance of a collector requires its inspection and diagnostics, it is repaired if necessary. Thorough collector maintenance is possible only after its drainage. The most frequently used method of a collector drainage consists in its overlapping with plugs with further pumping of sewage via temporary branches, bypassing drainage rehabilitating sections. This method involves considerable technical and material difficulties and can be used mainly for drainage networks with diameter up to 400 mm. It also requires electrical energy to connect pumping units. This paper describes alternative methods of gravity sewage network drainage for the purposes of its inspection and repair, which provide high-quality maintenance of gravity sewer networks. These methods extend the network service life, as well as minimize the costs of diagnosis and repair works.