An analysis on the selection of new methods for improving urban wastewater collection network in iran

Sewage networks, over time and depending on the amount of use, gradually wear out and, as a result, create complex problems for people in the areas covered by the network services, including breakage, leakage and cracking, severe corrosion of the network. cement and asbestos pipes), the fall of the pipe crown, obstruction due to the entry of tree roots, the release of unpleasant odors, leakage, obstruction and the increase of vermin (cockroaches); Thus, in such areas, network reconstruction and modification operations are required and considered necessary for the health of the environment and the health of the people. Various methods are used in different parts of the world for the reconstruction of sewage networks, each of which has its own strengths and weaknesses. The goal of the researcher in this research was to review and evaluate the economic, social and environmental common methods of sewer network reconstruction, as well as analysis using the SWOT technique and choosing the best method for the sewer network reconstruction. In this regard, various methods including traditional open trench modification, CIPP and Pipe Bursting have been evaluated using the SWOT technique and the strengths, weaknesses, opportunities and threats of each of them have been analyzed and described, as well as on the above methods of economic analysi , social and environmental studies were carried out and according to studies and field investigations, it showed that the pipe bursting method, due to reasons such as high speed in carrying out operations, no need for new excavations in the pipe path, the possibility of increasing the hydraulic capacity of the network and overall financial, social, And less environmental than other methods, it is the best method for renovation and reconstruction of sewage networks in Iran.