Analysis of the Stress-Strain State of the Pipeline in the Areas of Frost Heaving of the Soil Using the SCAD Software Package

Abstract

The article is devoted to the actual problem of construction and operation of pipelines in difficult geological conditions. The paper analyzes the interaction of permafrost soils with underground structures. One of the main problems is considered the soil heaving - the ability of water-saturated soils to increase its volume when frozen. The authors analyzed one of the existing calculation methods for determining the stress-strain state of a pipeline laid on heaving soils; the dependences of the determination of the normal forces of frost heaving have been investigated; calculated the values of stresses and displacements in the SCAD software package. It was revealed that the problems associated with the phenomenon of changes in the volume of soils with temperature drops depend both on the rate of soil freezing and on the length of the heaving section.