| 摘要 |
PROBLEM TO BE SOLVED: To lengthen a time span up to repair by making a bridge a long life by solving the problem that rainwater, muddy water or the like leaks from a loose gap to accelerate aging of a concrete structure of a floor slab and an iron member of a main girder or a concrete member and the problem that since salt is spread, in particular, in a district supposing road surface freezing, salt damage of a girder and a pier of a bridge occurs. SOLUTION: A drainage structure of a bridge joint part is provided with a high step part on the upper faces of mutually opposite both floor slab concretes, and a low step part lower than the high step part and arranges a drain passage having an inclination in a width direction of the bridge on both the low step parts. The whole upper face between both the floor slab concrete high step parts and in a loose gap is serially covered with a member having a metal flat face part installed by bringing an impermeable sheet or waterproof paint, a high step part upper face and friction reducing coating metal into face contact with one another so as not to be leaked in the loose gap. COPYRIGHT: (C)2005,JPO&NCIPI |
