Analysis of Underground Pipelines Subjected to Frost Heaving Forces

Abstract:

This paper examined the fundamental problem of an interaction between a soil medium that experiences frost heave in a closed system and an underground pipeline. The coupled thermal transfer and structural analysis, considering the material nonlinearity of freezing soil, for an underground pipeline subjected to the low cyclic load was focused on the development of computational scheme by introducing the effective heat capacity concept and the effective thermal expansion coefficient into the study. The effective heat capacity model in the thermal transfer analysis took into consideration the phase-change effect in the frozen fringe of a soil medium. The comparative analyses between the theory and the actual performances were valuable in establishing a level of confidence in the application of introduced theory to the field. The numerical results in the paper illustrated the influence for the frost heave of a soil medium on the temperature-dependent development of stress fields on metallic underground pipe walls in South Korea.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 1241-1252
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.1241
• Online since: November 2005
• Authors: Weon Keun Song, Jong Woo Rhee
• Keywords: Closed System, Effective Heat Capacity Model, Effective Thermal Expansion Coefficient, Freezing Soil, Soil-Pipeline Interaction, Stress Analysis

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