| 摘要 |
PURPOSE: A freeze protection device of a bridge drainage facility is provided to prevent the dysfunction of a drainage hole when a collecting channel or a drainage hole freezes owing to heavy snow and a cold wave. CONSTITUTION: A freeze protection device of a bridge drainage facility comprises a collecting heater (100) and a bent pipe heater. The collecting heater is installed into zigzags on a protrusion (16a) which is formed to be lower than the upper surface of a steel grating (16). The inner surface of a bent pipe is installed with one or more bent pipe heaters. The bent pipe is connected to a horizontal drainpipe or a vertical drainpipe connected to a collecting channel. |
