Rail Track Isolation Systems - Trelleborg.com.au

Rail Track Isolation Systems

Rail Track Isolation SystemsTrelleborg Queensland Rubber is a leading supplier oftechnically advanced solutions for rail track isolation.We have developed a comprehensive range ofelastomeric-based products to significantly attenuateground-borne vibrations resulting from train passes.In general, structure borne noise isolation is asignificant design issue in densely populated areasadjacent to subways, commuter lines and/or light railsystems. We have a broad range of products to providethe required degree of isolation for most applicationsinvolving rail track noise and vibration.Our unique range of products includes :-• Floating Slab Track (FST) Bearings• Resilient Bonded Baseplates / Track Fasteners• Low Vibration Track (LVT) Boots and Pads• Ballast MatIn conjunction with our US-based partner ATP wehave in excess of 30 years experience supplying trackisolation products for the rail industry.Our focus is to supply high quality products withsuperior performance that have been fully testedand verified using our extensive in-house testingcapabilities. The manufacturing sites in Brisbane,Australia, and Wuxi, China, are both certified to theQuality Standard ISO9001.Our expertise includes the design of elastomericbearings for anti-vibration mass-spring systems. Massspringsystems are also installed to acoustically isolateneighbouring structures that are particularly vibrationand noise sensitive such as concert halls and movieproduction studios. We have supplied customizedacoustic bearings to fully isolate numerous structureslocated adjacent to rail systems, including the Theatreson the Bay complex in Singapore and Hong KongMovie City.We are focused on forming partnerships with ourclients to develop cost effective and high performancesolutions for track isolation.

Resilient Track FastenersIn partnership with the US-based designer ATP, we area leading supplier of resilient bonded baseplates for railtransit projects. We have developed numerous designsto suit a range of different axle loads. Our proven andreliable systems of track fasteners include:• Egg-type Baseplates• Compression BaseplatesEgg-type Baseplates have a unique design that providesexcellent acoustic characteristics, failsafe long-termperformance and good electrical isolation.The geometry of the top and bottom plates providesa combination of lateral integrity and vertical softness.The top plate floats and the forces are primarilytransmitted in shear rather than in compression,thereby providing linear spring characteristics over thefull operating range.Our range of track fastener are suitable for bridges,viaducts and tunnels, and can be installed on eitherpre-existing slabs, insitu-slabs, pre-cast blocks, steeldecks, or steel plates supported by timber sleepers.Special baseplates for turnouts and guard restrainingtrack locations can also be supplied. Our baseplatesare designed to reduce ground-borne vibrations,reduce impact on supporting structures and reducemaintenance.Compession Baseplates usually provide dual stiffnesscharacteristics. Under low axle loads, such as emptypassenger coaches and freight cars, the baseplateoperates with significant deflection. However, underheavy loads the baseplate is designed to stiffenconsiderably to provide the necessary increasedsupport.

Ballast MatBallast mats are designed to reduceground-borne vibrations, thedegradation of ballast stones and thedamaging effect of impact forces onsupport structures. They are easilyinstalled on rigid support surfacesunder the ballast, such as concretetunnel floors or bridge decks.Fabric-reinforced Natural Rubberis the ideal combination to provideconsistent long-term performance.The Natural Rubber provides superiormechanical and dynamic properties.Flexible fabric reinforcement ensurestrack loads are distributed uniformlyand prevents penetration of ballaststones.Our ballast mats are typically supplied in rollsthat can be simply handled with a forklift.Sections of the rolls are field cut to suit theparticular application. Joints are coveredby an inherent flap extending from the topsurface on one side of the mat, therebyensuring the covering of joints is a simpleand efficient process.Low Vibration Track (LVT) Boots and PadsTrelleborg Queensland Rubber is a licenced supplierof Low Vibration Track (LVT) Boots and Pads. LVT isa non-ballasted track system comprising independentrail supports encased in a second pour concrete.The rubber boot isolates the rail support from thesurrounding structure and the micro-cellular pad isdesigned with a certain spring rate to provideeffective attenuation of the vibrations.LVT provides a number of advantages includingaccurate track geometry, exceptional lateral resistanceand a proven record of long term maintenance freeoperation.

Floating Slab Track (FST) BearingsFloating Slab Tracks (FST’s) are a proven mass-springsystem for achieving very high levels of vibrationisolation. The degree of isolation achieved on ourmost recent installations is far superior to almost allother available systems of track form. In particular,FST bearings are suitable for reducing low frequencyground borne vibrations.We have recently supplied FST bearings for theextensive Hong Kong rail system, including :-• KCRC West Rail• KCRC East Rail Extensions• MTRC Lantau and Airport Railway Phase 2Our FST bearings are manufactured using a specialdual compound design to ensure consistent long-termperformance. The bearings are principally NaturalRubber to provide excellent mechanical properties,extended durability, low creep rates and low dynamicto-staticstiffness ratios. In regards to their provenrecord of long-term durability, some elastomericbearings in bridge support applications have beenoperational for in excess of 100 years.We supply custom designed bearings to supportvertical, lateral and longitudinal loads applied to eachspecific Floating Slab Track unit. The bearings can bedesigned to support pre-cast and in-situ slab systems.In addition to extensive development trials andrepeated cyclic tests on prototype samples, thebearings are comprehensively tested duringmanufacture to ensure consistent compliance with thespecified performance requirements.

For superior performance werecommend a combined systemof Trelleborg Floating Slab Trackbearings and Trelleborg / ATPEgg Baseplates. This doubleisolation system has beeninstalled on some of thequietest railways inthe world.Track Isolation PartnersAUTOMOTIVETrelleborg Queensland Rubber Pty Ltd 515 Zillmere Rd., Zillmere, Brisbane, Australia 4034Phone +61 (7) 3866 7444 Facsimile + 61 (7) 3263 4912Email: tqr.info@trelleborg.comCreative 5810 2/03