Abstract
During prolonged heat exposure to the frozen soil while pipeline operation, thawing of soil occurs, it leads to erratic rainfall and distortion of structures, up to their full destruction. Force interaction of the pipeline with the soil occurs due to frost heaving and thawing, which leads to significant non-monotonic deformations of the metal pipe, to accidents. In addition, with the increase in temperature of frozen soils their physico-mechanical properties change, which reduces the carrying capacity, even if the soils have not started to melt. It is shown that for an extended object, what is the pipeline, its construction on peat foundation with the undisturbed vegetation is admitted. The corresponding experiment conducted on the basis of modelling longterm process of thermal and mechanical interaction the ground pipeline in a mode of self-loading, showed that under temperature regulation in halo thawing and maintaining it within the acceptable range is sufficiently rapid precipitation and stabilization of swelling, the pipeline adopts a stable position with minimum oscillation up and down, decreases fatigue loading. Peat base with an unbroken surface layer of moss has heat-shielding properties and additionally protects the base of the pipe against heat penetration and the underlying frozen soils melting, which gives a certain amount of enthalpy of oil pumped and reduces the hydraulic resistance of the pipeline.
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