Most of the soundproof tunnels generate significant discharge noise through their inlets and outlets so that the length of the tunnel has been extended frequently than required to minimize the effect on such discharge noise. Thus, in this paper, we investigate reduction capability of discharge noise from the sound proof tunnel installed with lateral sound-absorbing panels on the partitioned truss members in the longitudinal direction of the tunnel. In conclusion, noise field analysis results shows that the sound proof tunnels with lateral sound-absorbing panels have an effect on discharge noise abatement and thereby tunnel’s length reduction.

1. 서 론
 2. 강관을 이용한 트러스형 방음터널
  2.1 방음터널 구조 특징
  2.2 직각 흡음체의 기능과 효과
 3. 토출소음 저감효과 해석 개요
  3.1 토출소음 저감효과 해석 목적
  3.2 토출소음 저감효과 해석 절차
  3.3 해석 모델링 및 조건
 4. 토출소음 해석 결과 및 분석
  4.1 토출소음 저감효과 분석
  4.2 터널 연장감소 효과 분석
 5. 결 론
 ACKNOWLEDGMENT
 REFERENCES

• 정영도(포스코건설 R&D센터 책임연구원) | Jeong Young Do
• 안동욱(포스코 철강솔루션마케팅실 구조연구그룹 책임연구원) | Ahn Dong-Wook
• 노명현(포스코 철강솔루션마케팅실 구조연구그룹 책임연구원) | Noh Myung-Hyun Corresponding author