The Clem7 Motorway Tunnel: Mechanical and Electrical Plant Acoustic Design and Performance

摘要

The 4.8 kilometre Clem7 tunnel passes underneath the Brisbane river, providing a direct connection between the northern and southern Brisbane suburbs. During the design and construction phases of the project, various acoustic design issues were addressed. These included airborne noise emissions from the electrical and mechanical plant servicing the Clem7 tunnel. Computational acoustic model predictions of plant noise emissions from the ventilation building outlets, and the various tunnel portals were completed using specialist acoustic software. This paper presents an overview of the key acoustic design issues associated with the mechanical and electrical plant noise sources for the Clem7 tunnel. The modelling methodology and acoustic control solutions that were adopted are described, and the outcomes of the acoustic monitoring during the commissioning phase are presented.