PRACTICAL TRIAL OF AN ASPHALT RAILROAD BED WITH Y-SHAPED SLEEPERS. FINAL REPORT.

ERPROBUNG EINER FESTEN FAHRBAHN IN ASPHALTBAUWEISE MIT Y-SCHWELLEN. ABSCHLUSSBERICHT

In order to cope with ever-increasing speeds and axle loads of modern trains, the 'Studiengesellschaft Asphaltoberbau e.V. fuer Schienengebunden Verkehr' (Study Group on Asphalt in Railway Bed Application) has developed a stable asphaltic railway bed which needs little maintenance. The multi-layer structure placed on the subsoil consists of: a synthetic filter fleece on a sub-base graded to a slope of 1:20, a frost-free layer of 400 mm thickness, an asphalt base course of two layers, each 150 mm thick, a special tack coat, about 3 to 5 mm thick, anchoring bolts to fasten the sleepers to the asphaltic base course. After a total load of approximately 25 million tonnes had passed along the trial trck by the end of December 1985 and after the experience gained so far and the measuring results are at hand, the structure can be said to have the following advantages over coventional designs: the resistance to transversal displacement forces is many times higher; the vibration in the track is much lower and there is highly reduced after-vibration following the train, which ensures a longer life of rail fastenings. The bedding stability is higher, trains run smoother, the optimized track geometry (no rocking of the train cars) is likely to reduce wear and corrugation of rails; trom the measuring and test results of the Centeral Engineering Office of Deutsche Bundesbahn and of the Technical University of Munich it appears that the track's long-term performance will be good, which means that axle loads ma be increased and maintenance intervals be extended.

• Corporate Authors:

  Studiengesellschaft Asphalt-Oberbau

  Hamburg,   Germany 
• Authors:
  • Beecken, G
• Publication Date: 1986

Language

• German

Media Info

• Pagination: 22 p.

Subject/Index Terms

• TRT Terms: Asphalt pavements; Axle load force; Railroad cars; Railroads; Reduction (Chemistry); Speed; Subgrade (Pavements); Vibration
• Old TRIS Terms: Reduction
• Subject Areas: Highways; Materials; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00477069
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Nov 30 1988 12:00AM