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UDC 628.21:62-192
GALPERIN E. M.
Ways of improving the integrity of wastewater network
Summary
The analysis of the main wastewater network failures is given. The data from foreign literature on blockage frequency depending on the pipe diameter is presented; for the classification of pipes by blockage risk level an index, i. e. generalized risk factor is suggested. The index stating the annual number of blockages per 1 km of a sewer of a certain diameter is more acceptable. Periodic maintenance, running or capital repair is a necessary requirement of the operation of any facility. Draining the pipe section under repair is a crucial stage from the point of view of the network integrity. It is suggested instead of one big sewer to lay two parallel sewers with total throughput capacity equal to that of the replaced one. The use of reinforced concrete pipes made of cement fondu characterized by the high corrosion resistance, long lifetime and abrasion resistance is considered. Savings from operation of reinforced concrete sewers made of cement fondu can compensate for its high cost. Polyvinylchloride is a perspective material for sewer production. The attention is drawn to the need of improving standards and regulatory documents related to the sewer maintenance.
Key words
reliability , pipeline , sewerage network , polyvinylchloride , generalized risk factor
