抄録
In cold region, a heat insulator for icicle prevention has been developed in the new constructed and existing tunnels. In order to determine the necessary length of anti-icicle treatment from tunnel entrance area, this paper presents a theoretical equation for estimating the temperature in the tunnel. The equation is obtained using theoretical model considered heat convection/conduction between the tunnel ground and the air flow in the tunnel. Applicability and accuracy of the equation are examined by comparing the calculated results with measured results. It is found that the calculated values well agree with those measured in the field.
