Improving the method for assessment of bending stresses in the wall of an underground pipeline

Brief information about modern methods for determining the bending stresses of extended sections underground main pipelines without access to pipeline generatrix is given. The necessity modernizing based on configuration axis from soil surface with subsequent calculation obtained data substantiated. A mathematical model that allows calculate optimal parameters surveying a arbitrary and depth, when planning study, proposed. Bench tests BITA-1 finder were carried out determine error in measuring depth axis. It proved deviations relative true values narrow intervals follow normal distribution do not change their sign. confidence device are presented.