Optimum heat insulator in consideration of statistical atmospheric conditions for an adiabatic icicle prevention in an existing tunnel

Katsuya OKADA, Yoshiji MATSUMOTO
1988 Doboku Gakkai Ronbunshu  
This paper deals with the optimum method of a heat insulator for an adiabatic icicle prevention at tunnel-lining surface. The atmospheric conditions, which consist of yearly mean temperature, yearly amplitude and daily amplitude, are estimated as statistical values following an extreme distribution analysis. They are incorporated into a nonsteady state heat convection/conduction analysis about a tunnel-ground model with adiabatic treatment. Thus the material and the thickness of a heat
more » ... for the icicle prevention can be designed reasonably and economically on the basis of the periodicity of atmospheric conditions and the thermal conditions of a tunnel-ground.
doi:10.2208/jscej.1988.400_171 fatcat:z2dt2jcibba23jh5sfot3simwy