NOISE REDUCTION STRUCTURE FOR BRIDGEWORK

PROBLEM TO BE SOLVED: To provide a structure capable of inexpensively reducing noises by a little labor, in regard to construction work performed near a bridge joint.SOLUTION: In an end cross girder 8 placed at an end of a main girder 4 for supporting a floor slab 5, a noise reduction structure is formed by installing four soundproof panels 10 on both inner and outer surfaces, respectively. A first unit panel 11 having a magnet layer 13, an adhesive layer 14 and a steell plate 15, and a second unit panel 12 having a magnet layer 16, an adhesive layer 17 and a high-specific-gravity resin layer 18 are stacked to form the soundproof panels 10. The noise reduction structure can suppress vibrations associated with construction work for an expansion device 52 provided at the end of the floor slab 5 and reduce noises. 【課題】橋梁継目の近傍で行う工事に関し、安価かつ少ない手間により騒音を低減できる構造を提供すること。【解決手段】床版５を支持する主桁４の端部に配置された端横桁８に、４つの防音パネル１０を内外両面に夫々設置して騒音低減構造を形成する。防音パネル１０は、マグネット層１３と接着層１４と鋼鈑１５を有する第１の単位パネル１１と、マグネット層１６と接着層１７と高比重樹脂層１８を有する第２の単位パネル１２とを重ねて形成する。この騒音低減構造は、床版５の端部に設けられた伸縮装置５２の工事に伴う振動を抑制でき、騒音を低減できる。【選択図】図１