Fastening Systems

Vanguard

Vanguard is the ideal fastening system when the transmission of vibration and noise from track to nearby buildings needs to be reduced. It achieves this by providing exceptionally low vertical stiffness and therefore high levels of vibration isolation between the rail and the slab or tie. At the same time, it does not compromise the control of lateral rail head movement and dynamic track gauge.

As it provides effective vibration isolation when used on plain slab track, Vanguard can be retrofitted to many existing tracks where noise and vibration need to be addressed. In addition, it can provide significant cost savings when used in new tunnel projects, as it can be fitted in tunnels of smaller diameter than alternative systems.

Technical Features

  • Unlike conventional fastening systems, Vanguard supports the rail by the web of the rail rather than underneath the rail foot. This means that exceptionally low vertical stiffness can be achieved, without compromising the control of lateral rail head movement and dynamic track gauge
  • Vanguard can be supplied in a variety of configurations, including different stiffness levels, anchor types and anchor positions
  • Lateral and vertical adjustments can be made to the position of the rail. Standard configurations with anchor bolts typically allow +/-20mm of lateral adjustment per rail and a 30mm range of vertical adjustment
  • Compared to many other low-stiffness fastening systems, Vanguard has a low rail position relative to the top of the track slab or tie
  • Natural frequency of approximately 20-25 Hz

Advantages

  • Highly effective control of ground-borne noise as a result of exceptionally low vertical stiffness. A very high level of vibration isolation between the rail and track slab or tie means reduced transmission of vibration from the rail into the ground and the foundations of nearby buildings. This controls the noise that can sometimes be heard due to the vibration of walls, ceilings and floors of buildings near railway lines
  • Reduced noise emission when used on bridge and viaduct structures because of the high level of vibration isolation between the rail and the bridge/viaduct below
  • Customisable configuration to suit a wide range of customer requirements with regard to stiffness, track construction methods and the need to retrofit the fastening system to existing track slabs and ties
  • Suitable for use in small diameter tunnels as a result of compact track form, resulting in significant cost savings

Key Facts

Sectors
  • Light Rail
  • Transit
  • Metro
  • Main Line
  • High Speed
Installation Methods
  • Top Down
  • Bottom Up

Product variations

  • 2 Anchor Baseplates
    2 Anchor Baseplates

    Optional anchor types

  • 4 Anchor Baseplates
    4 Anchor Baseplates

    Optional anchor types

Fastening Systems

Vanguard

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