SOUNDPROOF DEVICE IN BRIDGE AND SOUNDPROOF FOAMSPRAYING METHOD

摘要

PURPOSE: To prevent noises made in a bridge girder from getting rid of them to the outside by spraying foaming material to the surface opposed to the bridge girder and, at the same time, overhanging walls of the foaming material on both ends of the bridge girder to form a box-shaped space. ;CONSTITUTION: The inside of a bridge pier 2A is scraped and cleaned. After that, for example, a wooden form 3 is spread between both ends in bridge girder 2B. At the same time, a lower flange part in the bridge girder 2B is used to spread a plate-like scaffold 4. A separation sheet of a vinyl sheet, etc., is attached to the inside of the form 3. Then, foaming urethane is sprayed to the inside of the bridge girder 2A, and right and left soundproof layers 1A are formed. At the same time, the foaming urethane is sprayed to the inside of the form 3, and the front and rear soundproof walls 1B are formed. According to the requirement, the foaming urethane is sprayed on the outside in the bridge pier 2A, and both right and left outside sound-proofing layers 1C are formed. The form 3 is stripped, and the soundproof layers 1A and 1C and soundproof walls 1B are obtained.;COPYRIGHT: (C)1994,JPO&Japio