The general features of determining the hanging gas pipelines’ stress-deformed state have been established, under the condition that this procedure is carried out on the basis of geodetic measurements of displacements, taking into account their existing relative errors. The overhead crossing of the Uherske – Ivano-Frankivsk gas pipeline across the Svicha River has been chosen as a specific design. The role of force factors applied to the gas pipeline by the retaining ropes is noted. The problem of determining the unknown force factors applied to the gas pipeline has been formulated, according to the available deformations data, which is obtained by geodetic measurements and contains errors within the regulated ones. To do this, a simplified model of the overpass has been developed, in which the number of retaining ropes is reduced to three. Concentrated forces are applied to the pipe at the points of attachment of the ropes, which are equivalent to the actions of the holding ropes’ forces and thegravity forces from the weight of the pipeline and the transported product. It has been proposed to apply the canonical equations of the force method to the simplified discrete pipeline model. Test results of stress-deformed state assessment have shown the appearance of cases that lead to violation of the deformed state’s physical principles. In fact, the deviation of the main axis line from the spline of deformation leads to a violation of the principle of the minimum potential energy of deformation. The reason that leads to these consequences is the presence of errors in these deformations. An iterative algorithm for the use of smoothing procedureshas been developed. The search for unknown force factors is carried out according to the established criteria from a predetermined factor space. The obtained results have shown that with a relative error of geodetic measurements of 5 %, the force factors differ from the real ones by no more than 18%. At the same time, the main indicator of the stress-deformed state – the bending moment – remains more stable with an error of up to 6 %
Received 02.09.2021
Revised 10.01.2022
Accepted 01.03.2022
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