터널형 방음벽의 벽면부 개방에 따른 환경 소음 저감 효과 연구

초록

Sound proof walls established in order to reduce noise of railroad car driving on bridge have an advantage on reduction of high-rise apartment. But it has a problem due to concentrated stress of bridge edge because obstructs external flow. The problem which is concentrated stress generates safety problem of bridge. This study is to consider design plan of a type of partial opening on soundproof walls in order to reduce wind load caused by tunnel type soundproof walls and to conduct acoustic analysis using computational analysis. Insulated material of soundproof walls reviewed is designed sound insulation to reduce more than 10 dB and wind load to reduce by 20 %. After applied insulation material, it is predicted that it has an effect on noise reduction from high-rise apartment which is about 10 ~ 15 dB by height of bridge when driving railroad car nearby apartments. As a result, application on insulation material of a type of silencer on soundproof walls could be able to expect noise reduction effect.