| 摘要 |
PURPOSE: A double rain draining device for a bridge is provided to prevent the corrosion of reinforcing rods inside the bridge and to reduce efflorescence of concrete. CONSTITUTION: A double rain draining device for a bridge comprises an upper pipe(10), a hollow cylindrical lower pipe(20) and an end projection part(30). A body(10a) of the upper pipe is inserted an asphalt layer of the bridge. The upper pipe guides the rain on the asphalt surface to a surface water inflow hole(40). The lower pipe is communicated in the lower part of the upper pipe. The lower pipe is combined with the upper pipe through the end projection part. The end projection part has an infiltrated water inflow hole(35) in order to guide the rain on the bridge slab upper side. |
