| 摘要 |
PROBLEM TO BE SOLVED: To restrain deformation of an expansion joint at the time of earthquake or the like and exertion of damage up to the other bridge part by providing a shock absorbing material between mutual finger parts opposed by sandwiching a loose space of the expansion joint for a bridge. SOLUTION: An expansion joint for a bridge has steel material waveform comb-teeth-shaped finger parts 2 projecting in the mutually meshing direction from the mutually opposing side to support a unit load per travel wheel of a traveling vehicle, and absorbs the expansion/contraction of a bridge girder by a temperature change or the like by mutually approaching/separating a comb-teeth part. A shock absorbing material 3 composed of a rubber material is adhered and fixed to one side of the opposed finger parts 2, and a water stop seal material 4 composed of an elastic member is fitted to a lower part of a loose space 1. Even when the finger parts 2 opposed by sandwiching the loose space 1 collide with each other by an earthquake, a shock is relieved by the shock absorbing material 3. Thus, noise and vibration can be reduced, the expansion joint is hardly deformed and damage is hardly exerted up to the other bridge part, for example, post-cast concrete part 5, so that repairing is also facilitated.
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