風圧緩和防音工の構造と動作メカニズム

摘要

With respect to railway viaducts, raising a noise barrier has been desired to reduce the wayside noise. However, the higher the noise barrier is, the greater the load and moment by wind becomes, and it is hardly possible to install a very high noise barrier without reinforcing the viaduct drastically. Therefore we have developed a new type of soundproof system. In the developed system, the sides of soundproof panel are held by a magnetic attracting force, and the panel is fixed. Accordingly it has a high soundproof ability in the ordinary state, however, when the wind load amounts to a limit of keeping safety of the viaduct, the panel is opened and the wind load is reduced sufficiently.%騒音低減効果の向上などのために防音壁のさらなる嵩rn上げが求められているが，構造物を大規模に補強するこrnとなく防音壁の大幅な嵩上げを可能にすることを目的とrnして，風圧緩和防音工の検討を行った。その結果，以下rnの知見を得た。