| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage device for a bridge, which can secure a smooth downflow of water to be treated. SOLUTION: This drainage device (10) for the bridge includes: a dust-proof material (12) which is arranged in such a manner as to be elongated in an orthogonal direction in a joint gap between floor slabs, and formed of a water-permeable and elastic material; a water sealing body (14) which is arranged below the dust-proof material in the state of being suspended to bridge the joint gap, and which has impermeability and elasticity; and a drain pipe (18) which is attached in a downward elongated manner to a location adjacent to an end of the water sealing body. The drainage device (10) discharges the rainwater, stored in the water sealing body in such a manner as to permeate the dust-proof material, through the drain pipe. COPYRIGHT: (C)2011,JPO&INPIT
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