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In recent years, methods of trenchless pipe reconstruction have become widely used in Russia. Once the polymer pipe pulled into the existing pipeline, the necessity of filling the intertube space with a mortar is solved. Due to the lack of clear recommendations on the implementation of the filling, builders often perform these works by trial and error. This requires special research. The article deals with an analysis of standards in this area, There is an example of a static strength calculation.

Static calculations of the pipeline under sanitation by means of “pipe-in-pipe” method