BALLASTLESS RAILWAY TRACK PDF

In general, railroad track is consists of rail, rail joint, railroad tie and Non- ballasted track, also called ballastless track, is the railway track. The technical concept of a railway track consisting of ballast, sleepers, and rails is very old and has stood the test of time. Such a system is simple and can be. When the new high speed line Nüremberg-Ingolstadt is opened for service in , more than km of ballastless track will be in operation in Germany.

Author: Voodoole Groramar
Country: Poland
Language: English (Spanish)
Genre: Sex
Published (Last): 2 January 2008
Pages: 187
PDF File Size: 13.61 Mb
ePub File Size: 4.43 Mb
ISBN: 416-8-88106-937-2
Downloads: 83308
Price: Free* [*Free Regsitration Required]
Uploader: Ararr

Stabirails new method for railway track design provides many advantages: A ballastless track is expensive but is likely to require little or no maintenance during its lifetime. By using this site, you agree to the Terms of Use and Privacy Policy.

Slab track design

This tool allows the collection of large amounts of data, its analysis and the prediction of situations based on statistical patterns.

Theoretically, ballasted track is the creation of railway track development. From the existing S. You may also like: Ballastless track design offers many advantages compared to its traditional counterpart.

This technology can be applied on a uniform basis on rsilway, bridges, and tunnels. The different systems have undergone extensive laboratory and field tests before implementation on grade, bridges and in rajlway.

Ballasted Track And Non-Ballasted Track | Railway Track Comparison

The technical concept of a railway raulway consisting of ballast, sleepers, and rails is very old and has stood the test of time. In Figure 16, the mean static rail deflection of different S. Stabirails new ballastless railway track laying method took the world of slab track design by storm, with its guaranteed faster track laying times and more accurate design, thus cutting costs even further. In addition, these modifications enabled further improvement in the bond of the sleeper in the structural concrete.

  ACROSS THE MONGOLO PDF

As we all know, ballasted track and non-ballasted track are two typical kind of railway track.

Ballastless or Slab Track | Railway Track Design & Laying | Stabirail

By coupling the frames at the joints Figure 15 and notching the surface of the frames, a similar long-term behaviour can be expected as with continuously reinforced concrete slabs or the coupled slab track system in Karlsfeld. In order to attenuate the vibrations inherent to slab track and enable ballasstless of the vertical rigidity, the FASTRACK system has up to three planes of elasticity of scalable rigidity.

The values give information about the scatter of resilient support. The breaking of the ballast under the pressure exerted by the load causes geometrical unevenness and clogging of the ballast bed by fine particles.

Ever since then, this sector has experienced a fast development both in Switzerland and abroad and this has led to the optimisation and search for several new solutions and applications.

Learn how your comment data is processed. The success of ballastless-track technology is primarily based on the following advantages: Rheda system Pfleiderer on the line Ingelstadt Nuremberg. This sleeper is characterized by reduction in total structural height. Slab track is one of the most important types of non-ballast track structure.

Therefore, regular maintenance is needed to restore track alignment. Balllastless High attenuation of vibrations: However, this significantly increases the investment costs for a ballasted track. An analysis by the equations in Figure 3 demonstrates that the critical temperature rise DTo for buckling of a conventional concrete sleeper track is exceeded if the extra heat from eddy current brakes sums up to 18 K.

In general, railroad track is consists of rail, rail jointrailroad tracl and railroad fasteners, etc. The required rail deflection of 1.

Comparison of Ballasted Track and Non-Ballasted Track

The standard fastening system of DB AG for ballastless track ensures this deflection behaviour by a resilient base plate pad with a spring coefficient of While numbers vary depending on construction type and track infrastructure ballastless tracks are generally more suitable to infrastructures that are also made of concrete, as is the case in tunnels or on viaductsthe Deutsche Bahn estimated in that construction costs of ballastless tracks are 40 percent higher than those of traditional superstructure.

  ECHOKARDIOGRAPHIE BASICS PDF

Hence, for high speed traffic, a constant dynamic behaviour with increasing service time can be assumed, if a matured design and good quality is available. Earlier RHEDA models occasionally developed longitudinal cracks between the trough and the infill concrete that could influence the long-term behaviour of the ballastless track system. The application of elastic boots, combined with special microcellular rubber pads featuring special static and dynamic characteristics, has made this system a success for applications in and outside tunnels.

Underground and Tramway Tracks Ballastless Tracks. Horizontal efforts are transmitted to the ground by a steel stopper or fastening system, made of two ballasltess cylinders that slide along each other, allowing the free vertical movement of the slab. Further advantages of ballastless tracks include better and controlled drainagethe elimination of flying-ballast damage on rolling stock and civil engineering structures, a shallower superstructure, and the possibility run-over sections such as crossings over which pneumatic vehicles can be driven.

In a ballastless track, the rails are directly fastened to the concrete slab using elastic fastenings.

A reduction of rialway costs deems possible by use of a frame-shaped slab track. Consequently in Korea, a frame shaped S. Special advantages of this type of structure are greater independency under unfavourable weather conditions and the possibility of opening to traffic soon after construction.