Analysis of Fully Coupled Thermo-Mechanical Behaviour Around a Rigid CylindricalHeat Source Buried in Clay

摘要

The problem of fully coupled consolidation and heat flow around a rigidcylindrical heat source buried in clay has been studied. The governing equations of the problem are summarized in the paper and a finite element time-marching scheme to obtain an approximate solution to the governing equations is described. The stress-strain behavior of the skeleton of the saturated soil has been represented by both a linear elastic model and the Modified Cam clay soil model. The results of a limited parametric study are presented with the aim of understanding the major mechanisms of soil behavior close to buried canisters of hot radioactive waste. A range of soil properties has been included in the study, and the effects of soil disturbance during canister emplacement have also been considered.