THERMAL ANALYSIS ON ADIABATIC EFFECT OF RETAINING WALL WITH RIGID POLYURETHANE FOAM FOR FROST HEAVING

Abstract

Retaining wall constructed in severe cold region may happen to be suffered serious damages due to the ground freezing. This study aims to clarify the effect of adiabatic method. The adiabatic materials is adopted the rigid polyurethane foam which has the lowest heat conductivity, and set between wall and ground for heat insulation..
The object of this analysis is the reinforced retaining wall constructed at the site of New Shinkansen Line projects. This retaining wall is measured displacements of wall, temperatures in wall and ground and strains of reinforcement rod. Heat conduction analysis was performed about this retaining wall, in order to verify the heat constants and analysis method through the comparison between measured and computed temperatures. Hence, the effect of adiabatic method was clarified.