既設トンネルにおける気象条件の確率量を考慮した断熱つらら防止工の断熱材の最適化
1988 年 1988 巻 400 号 p. 171-177
詳細
1988 年 1988 巻 400 号 p. 171-177
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 insulator 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.
