SOUND INSULATING STRUCTURE OF BRIDGE

摘要

PROBLEM TO BE SOLVED: To control heavy low tones emanating from a bridge. SOLUTION: A plurality of main girders extending along the longitudinal direction of a transport passage component member are arranged parallel to the cross direction of the transport passage component member below the transport passage component member, and a plurality of horizontal girders 4 formed by placing plate-shaped bodies upright between the main girders along the cross direction of the transport passage component member are arranged parallel to the longitudinal direction of the transport passage component member. When the transport passage component member is supported on bridge base material and noises produced in the bridge suspended between the bridge base materials are suppressed, a vibration control member 7 formed by laminating a sound absorbing layer 7a made of a soft elastomer and an outer surface layer 7b made of a hard material is fixed integrally with each horizontal girder 4 near the bridge base material in such a way that the sound absorbing layer 7a is losely contacted with the surface of the surface of the horizontal girder 4.