SIMULATION OF THE STRENGTH OF TWO-LAYER PIPE STRUCTURES IMPLEMENTED IN THE TRENCHLESS REPAIR METHOD AND ASSESSEMENT ITS ENERGY SAVING DURING WATER SUPPLYING
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Abstract
The article proposes approaches for assessing the strength characteristics of two-layer pipelines formed as a result of using a trenchless method for the reconstruction of dilapidated steel pipeline networks by pulling pipes made of unplasticized polyvinyl chloride (UPVC) into them. The results of simulation of filling the annular space between steel and polymer pipes are presented with an analysis of the three states of a two-pipe system in order to ensure strength characteristics. The paper provides an analysis of the possibility of saving energy when using PVC-U pipes in a two-layer pipe structure at various temperatures of supplying water and a stable temperature of the pipeline wall. Besides, it proposes the introduction of a set of developed automated programs for design.
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