In 2018, the Swedish Transport Administration issued a request for an overlapping, post-free noise barrier in varying shades of green for the Stockholm Bypass project. In addition, the barrier was to feature screen printing to serve as a bird strike protection.
Stockholm Bypass, Project "Hjulsta South".
Technical Specification
Approximately 3000 metres of post-free noise barrier, of which 2100 metres are transparent, 900 metres are sound-absorbing. 1750 metres of the transparent section also include a sound-absorbing cassette.Each section is measured and adapted individually, shaped as a parallelogram to follow the gradient of the bridge.
Performance
CE-marked according to EN 14388 with the following features:
- Acoustic performance: Class B3 as per EN 1793-2
- Mechanical requirements: EN 1794-1:2011 and EN 1794-2
- Wind load calculated according to EN 1991-1-4, Terrain type II
- Snow load as per EN 1794-1:2011 Annex E, based on snowplow speed of 60 km/h
- Stone chippings: Screen must be tested and comply with 1794-1:2011 Annex C Stone chippings
Material
- 12 mm Hammerglassin three shades of green, screen-printed with bird deflection patterns
- Hot-dip galvanized steel, execution class EXC2
Noise barrier system Post-free
The transparent Post-free noise barrier – designed for the future
Lear more about system Post-free
More about the challenges of a post-free noise barrier
System
Hammerglass Post-free,
noise barrier without posts
Client
Swedish Transport Administration
Principal
JV Hjulsta-S-konsortiet
Implenia-Veidekke
iNFRA PROJECTS
