Highly damping fastening system 336 on the metro tunnel project in Melbourne

With the new highly elastic 336 rail fastening system for slab track, Vossloh offers rail infrastructure operators an optimum solution when criteria of structure-borne noise play a special role, as is currently the case in Melbourne with the metro tunnel project. The construction of the 9.5-km twin rail tunnels between South Kensington and South Yarra with 5 new underground stations is the largest public transport project in Victoria so far. As track/system supplier primarily responsible, Vossloh is implementing together with PORR different superstructure solutions for slab track optimally tailored to the line-specific needs.

A compelling and customer-oriented overall concept for an optimized noise & vibration control

In order to meet even the highest customer demands for noise & vibration control, the 336 system is used on the vibration-critical tunnel sections. Its very low stiffness of 8.5 kN/mm was thoroughly tested and confirmed in high-frequency dynamic tests at Müller BBM. In the transition between the classic form of slab track and a “floating slab track”, the stiffness range of the 336 is between 10 and 15 kN/mm.

The other permanent way solutions in the metro tunnel project were realized with the mass transit version of system 300 (formerly 300 UTS).

Main components of the system 336

  • Pre-assembly of the fastening components possible
  • Safe anchoring in in-situ concrete with two anchors – also in curves
  • Optionally also available as an asymmetric system
W-shape of the Skl 21
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  • W-shape of the Skl 21 provides safety
    • Tilting protection, rail creep resistance, maintenance-free
    • Protected against corrosion by Vossloh protect​
Screw-dowel combination
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  • Screw-dowel combination with trapezoidal thread for a secure clamping (alternatively: anchoring with anchoring bolts)
Isolating bush
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  • Isolating bush (distance bush) for the stable clamping to the in-situ concrete or the intermediate rail plate
Isolator
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  • Isolatorfor additional electrical insulation / lateral adjustment
Rail pad
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  • Rail pad for additional minimization of vibrations and structure-borne noise
Ribbed plate
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  • Ribbed plate - in the highly elastic system design with friction-modified bushes
Intermediate plate
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  • Intermediate plate for high vibration damping (highly elastic design with up to 8 kN/mm possible in combination with friction-modified bushes)
Intermediate plate
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  • Intermediate plate for electrical insulation

Production & Logistics: From preparation to storage at PORR

“The cooperation in our first joint slab track project in Australia is very good. Through Best-for-Project-Engineering, we make an important contribution to the track quality and longevity of the new metro tunnel link through Melbourne.”

Special characteristics of the tension clamp curve such as the second stiffness