Advanced methods of the Moscow water distribution network reconstruction

Summary

A review of the advanced trenchless technologies of pipeline repair is presented. The main methods of damaged pipe rehabilitation with the use of polyethylene U-liner, spraying on cement-sand coatings, synthetic tubes impregnated with special polymerizing compounds are considered. The methods based on installing polyethylene, steel or cast iron pipes in the existing pipeline subject to reconstruction: «pipe in pipe without bursting» and «pipe in pipe with bursting» (pipe bursting) are discussed; their advantages and disadvantages are considered in relation to the conditions of usage in the dense city infrastructure.

Key words

polyethylene , pipeline , trenchless reconstruction , steel , cast iron , cement-sand coating , polymer liner

Economic methods of network renovation under the conditions of a megacity

Summary

Searching for the methods of rehabilitation of utility networks has become a top priority task for «Vodokanal» MUE in the process of planning the operational program of replacing the old pipelines and carrying out repair works. After the comprehensive analysis of the cost of replacing water pipelines and sewers in the cluttered urban environments it was decided to introduce innovations that could provide for the network renovation with minimum expenses for improvements. The arguments are put forward in favor of the use of trenchless technologies of water and sewage pipelines rehabilitation in the city of Ekaterinburg. During the tests of the technologies their advantages and disadvantages were revealed. The conditions of the economic viability of using trenchless technologies are recommended.

Key words

siphon , water supply network , sewer , sewerage network , polymer liner , trenchless renovation of pipelines