The Journal of Pandrol Rail Fastenings 2011 - Pandrol USA

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DIRECT FIXATION ASSEMBLIES VANGUARD in Singapore................................................................................................................page 03 by S C BARLOW, S J COX and A WANG, Pandrol Fastenings Ltd, UK; J T NG, Senior Project Engineer and L S TAN, Senior Project Manager, Rail Group, Singapore Pandrol Success at Belgrade Central Station – Construction of Railway Tracks on Continuous Concrete Slabs in Belgrade Central Railway Station .........................................page 06 VANGUARD on Sao Paulo Metro, Brazil – Vibration and Secondary Noise Reduction with PANDROL VANGUARD............................................................................................................page 08 PANDROL FASTCLIP PANDROL FASTCLIP FE ....................................................................................................................page 10 The Kadiköy-Kartal Metro Line, Turkey.........................................................................................page 13 The Gautrain Project, South Africa ................................................................................................page 16 Sri Lanka – Steel Sleepers for the Sri Lanka Railways Hill Sections............................................page 18 by Dr M. Seshagiri RAO, FICE, FPYI Rahee Track Technologies Pvt Ltd, Kolkata, India PROJECTS Field Repair of Concrete Gauge Convertible Sleepers – Australian Rail Track Corporation (ARTC)......................................................................................page 20 by Ben LESKE, Infrastructure Manager East West, ARTC VICTOR Baseplates for CSX Transportation...................................................................................page 21 by Kelly PICCIRILLO, Assistant Chief Engineer of Capital Projects, CSX Vortok Measure and Detect sensor ...............................................................................................page 23 NEW PRODUCTS Rosenqvist CD200 FASTCLIP Installation Machine........................................................................page 26 JH Spårservice Experience with Rosenqvist Installation Machines for PANDROL FASTCLIP.....page 27 Contents The Pandrol ‘Re’ assembly..............................................................................................................page 29 Front Cover: PANDROL FASTCLIP FC1600 Assemblies installed between Al Jouf and Hail on the North - South Line, Kingdom of Saudi Arabia. Back Cover: PANDROL FASTCLIP installed on High Speed Tracks, China. Track Report is published by Pandrol Rail Fastenings Ltd., 63 Station Road, Addlestone, Surrey KT15 2AR England. Telephone: +44 1932 834500 Telefax: +44 1932 850858 E-mail: info@pandrol.com Website: http://www.pandrol.com PANDROL, PANDROL FASTCLIP, PANDROL ’e’ Clip and PANDROL VIPA are registered trademarks of Pandrol Limited. VANGUARD is a trademark of Pandrol Ltd except in North America where this name is used by Nortrak for a check rail design. Pandrol Rail Fastenings gratefully acknowledges the co-operation of all those contributing to the production of this journal and who have given permission for the use of photographs. The technical information given in ’Track Report’ was correct at the time of printing, but the company undertakes a continuing programme of research and development, and improvements may have since been introduced.
DIRECT FIXATION ASSEMBLIES VANGUARD in Singapore by S C BARLOW, S J COX and A WANG, Pandrol Fastenings Ltd, 63 Station Road, Addlestone, Surrey, KT15 2AR, UK; J T NG, Senior Project Engineer and L S TAN, Senior Project Manager, Trackwork, Circle and Downtown Lines, Rail Group, LTA, Block 11, 1 Hampshire Road, Singapore Increasingly, environmental legislation aims to control the amount of vibration energy that can be transmitted into sensitive structures adjacent to railways. Where new buildings are erected it can be the case that the structures themselves are isolated using resilient bearings. It is most common, however for the railway itself to be treated by means of resilient track supports. This is known as “vibration isolation at source”. In tunnels on Singapore MRT, the track formation is concrete slab. Slab track has evolved considerably over the last few decades and there are numerous rail fastening options available to the track designer. Principal amongst these is the resilient baseplate, which directly anchors the rail to the correct alignment. LOW STIFFNESS BASEPLATES The baseplate most widely used on Singapore MRT slab track is the Double FASTCLIP (DFC) (Figure 1). It is characterised by having four FASTCLIP spring fastener clips per rail seat. Two outer FASTCLIPS fix a baseplate on a resilient studded rubber pad. Two inner FASTCLIPS anchor the rail on top of another resilient rubber rail seat pad. As with all baseplates that utilise spring clip fasteners, there are limits to the lowest vertical stiffness that can be provided. Since the efficiency of fastener vibration isolation is directly related to low vertical stiffness, spring clip fasteners are useful to a point, but for increased vibration mitigation alternative track support products must be considered. Typically, DFC has a vertical static secant stiffness of around 20kN/mm. In order to significantly improve the vibration performance of such a fastener, a step change in the vertical stiffness value is required. It was on recognising the limitations of conventional baseplate technology during the 1990s that Pandrol began to work on what developed into the Pandrol VANGUARD system for control of railway vibrations. This works on Figure 1 Original Pandrol DFC Assembly a quite different principle to conventional baseplates, in supporting the rail under its head rather than at its foot. The wedge-shaped elastomeric elements are compressed against the rail, so that as well as being supported, the rail is also fastened to the track foundation and maintains the required resistance to longitudinal loads. The principal advantage of the system over more conventional rail fastenings is that it allows significantly greater vertical deflections under traffic without unacceptably high rail roll. The low stiffness of the track leads to an improved attenuation in the dynamic forces generated at the wheel-rail interface, reducing the level of dynamic forces transmitted through the fastening, into the track foundation and beyond. These elastic elements now act in shear, rather than in compression, which is the case with DFC. Natural rubber, which also provides Figure 2 VANGUARD DFC Retrofit resilient vertical support in DFC, exhibits outstanding dynamic performance when used in the shear mode in the VANGUARD assembly. Unlike a permanently bonded baseplate, the whole system does not need to be replaced if the rubber eventually wears in time – the rubber elements can be removed and replaced in-situ. Using this system Pandrol VANGUARD delivers a vertical static stiffness of approximately 5 kN/mm and a dynamic stiffness of around 7 kN/mm in a safe manner and without excessive rail roll. The loaded track resonance of Pandrol VANGUARD in combination with typical railway vehicles - which have an un-sprung wheel mass in the range 600-900kg – occurs in the low 20’s of Hz. This means that the Pandrol VANGUARD system is effective in eliminating many railway vibration problems. In 2008, together with the LTA, Pandrol set about designing a version of the VANGUARD system that would directly retrofit into the 3
Page 1: The Journal of Pandrol Rail Fasteni
Page 5 and 6: DIRECT FIXATION ASSEMBLIES Vertical
Page 7 and 8: DIRECT FIXATION ASSEMBLIES speciali
Page 9 and 10: DIRECT FIXATION ASSEMBLIES NUMERICA
Page 11 and 12: PANDROL FASTCLIP Rosenqvist CD200 i
Page 13 and 14: Kadiköy-Kartal Metro Line, Turkey
Page 15 and 16: end October 2009. Excavation works
Page 17 and 18: PANDROL FASTCLIP assembly taking pl
Page 19 and 20: PANDROL FASTCLIP Initial trial inst
Page 21 and 22: PROJECTS VICTOR Baseplates for CSX
Page 23 and 24: PROJECTS The Vortok Measure and Det
Page 25 and 26: PROJECTS tension and SFT in the rai
Page 27 and 28: DIRECT FIXATION NEW ASSEMBLIES PROD
Page 29 and 30: DIRECT FIXATION NEW ASSEMBLIES PROD
Page 31 and 32: NEW PRODUCTS Completed track on Net

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