Modeling the Cryogenic Texture Formation Process in the Soil Around the Pipeline

[摘要] This article is concerned with the study and analysis of heat exchange processes, moisture transfer and cryogenic texture formation in fine dispersed soils when laying and operating underground pipelines. The segregation frost heaving around cold big-diameter pipelines buried in the soil has been investigated. The method of modeling the secondary frost heaving is presented. The conditions under which this model is applicable as a result of assumptions made during its construction are described. The model is presented in a stringent mathematical formulation. The checking numerical case has been calculated. The process of ice layers formation graph is given. Under certain conditions one layer can be formed and under the other conditions two layers can be formed. Mostly it depends on the pipe temperature. For this case the guidelines for soil frost heaving prevention are given. The guidelines are general and applicable to other cases.

[发布机构] Industrial Thermal Power Engineering Department, Tyumen Industrial University, Tyumen, Russia^1;Industrial Thermal Power Engineering Department, Russia^2;Business Informatics and Mathematics, Russia^3

[关键词] Formation graphs;Frost heaving;Heat exchange process;Mathematical formulation;Method of modeling;Moisture transfer;Texture formation;Underground pipeline