rheda 2000® ballastless track system on a spring-mass · pdf filerheda 2000®...
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Pfleiderer Aktiengesellschaft Postfach 1480 D-92304 Neumarkt, Germany Tel. +49 9181 28-8044 Fax +49 9181 28-606
Presseinformation
Press release
Information de presse
Pfleiderer track systems offers system which reduces noise and vibrations
RHEDA 2000® ballastless track system on a spring-mass system
Neumarkt, Germany, 20 June 2005 - Increasing train speeds and greater axle loads on the rail lines of today have correspondingly increased harmful impact from noise and vibrations for the areas around rail lines. The unevenness that exists between train wheels and the rails, as well as the dynamic deformation of the tracks that takes place when rail vehicles pass over, transmit vibrations into the subgrade. These vibrations cause tremors to occur in developed areas near the tracks. These phenomena, in addition, cause vibrations in the structural components of nearby buildings that, in turn, give rise to disturbance from secondary airborne noise. One of the most effective measures against the production of structural-borne noise and vibrations is the use of spring-mass systems, in conjunction with RHEDA 2000® ballastless track systems. These systems dampen the propagation of vibration. The design of such systems exploits the characteristics of the amplification function of single-mass oscillators. The use of spring-mass systems is particularly beneficial and effective in densely populated areas that are sensitive to vibrations. Spring-mass systems for tracks can be implemented in light, medium-heavy, or heavy models. If a light spring-mass system is installed, then entire-surface or strip support systems with elastomer mats are used. If heavy spring-mass systems are employed, point-support systems are frequently used: in the form of elastomer blocks or steel springs. The lower the frequency of the vibration to be eliminated, the greater the required mass of the mass track-supporting layer. Here, the structure of the RHEDA 2000® ballastless track system offers benefits to the entire system: the appreciable mass of the concrete track layer, with its bi-block sleepers
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embedded in concrete, contributes significantly to attenuation of vibrations. In addition, the RHEDA 2000® system – as a result of its structural properties that are insensitive to water and erosion – is well suited for application both on open track sections, as well as in tunnels. The RHEDA 2000® ballastless track system on a spring-mass system has already been installed in a number of projects, in the form of various models: e.g., in the Cologne-Bonn Airport Link (as a heavy spring-mass system), as well as in the Berlin North-South Link (with light to heavy spring-mass systems).
Application of the single-mass oscillator principle by the RHEDA 2000® model, installed on a spring-mass system
Brief profile of Pfleiderer track systems Pfleiderer track systems sees itself as a comprehensively oriented systems and engineering provider for main-track and turnout sleepers made of concrete. In close collaboration with its customers and partners, it offers all services from one source for product development, manufacture, and application: beginning with engineering; including production, supply, and logistics; and extending to quality management. With its ten locations (as of December, 2004) in Germany, Spain, the Netherlands, Hungary, Romania, and Taiwan, Pfleiderer track systems annually produces more than 2 million main-track sleepers, as well as over
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500,000 linear metres of turnout sleepers. The company achieved annual sales of more than 138 million euros in 2004. Fifty years of corporate experience and innovative technological expertise have made Pfleiderer track systems one of the most powerful and reliable partners throughout the world in the development and construction of track systems for rail transport: for underground railway networks, commuter train systems, light- and heavy-rail municipal systems, and for inter-regional commuter and mainline traffic operated by major national railway companies. For additional information, please contact: Pfleiderer track systems, Neumarkt Ms. Hedwig Blomeier Marketing Tel. + 49 9181 28 693 Fax + 49 9181 28 646 E-Mail: [email protected]
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Brief profile of Pfleiderer track systems Pfleiderer track systems sees itself as a comprehensively oriented systems and engineering provider for main-track and turnout sleepers made of concrete. In close collaboration with its customers and partners, it offers all services from one source for product development, manufacture, and application: beginning with engineering; including production, supply, and logistics; and extending to quality management. With its ten locations (as of December, 2004) in Germany, Spain, the Netherlands, Hungary, Romania, and Taiwan, Pfleiderer track systems annually produces more than 2 million main-track sleepers, as well as over 500,000 linear metres of turnout sleepers. The company achieved annual sales of more than 138 million euros in 2004. Fifty years of corporate experience and innovative technological expertise have made Pfleiderer track systems one of the most powerful and reliable partners throughout the world in the development and construction of track systems for rail transport: for underground railway networks, commuter train systems, light- and heavy-rail municipal systems, and for inter-regional commuter and mainline traffic operated by major national railway companies. For additional information, please contact: Pfleiderer track systems, Neumarkt Ms. Hedwig Blomeier Marketing Tel. + 49 9181 28 693 Fax + 49 9181 28 646 E-Mail: [email protected]
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