| 摘要 |
PROBLEM TO BE SOLVED: To prevent damage of a function of a structural body due to deterioration caused by exposure of concrete used for a concrete structural body such as a tunnel to flame of a fire and the like. SOLUTION: When a joint part of the concrete body, in which a refractory heatproof part formed of a castable material is provided on the surface, is protected by covering the joint part with a panel formed of a refractory heatproof material, the concrete part is not heated above 500 deg.C even if the concrete body surface is exposed to flame in the case of a fire. |
