LAYING OF TRACK WITHOUT BALLAST COMPARISON, FROM THE ASPECTS OF NOISE AND VIBRATION, WITH CONVENTIONAL LAYING ON BALLAST
POSES DE VOIE SANS BALLAST
After reviewing concisely the advantages and disadvantages of laying track without ballast, the author, Honorary Assistant Principal Engineer of the SNCF and Technical Adviser of the RATP, gives details of the different practical applications in France (SNCF and RATP) and abroad. He then describes three types of direct laying and explains the characteristics adopted which have been tested on the RER Etoile - La Defense line section; he enumerates the tests carried out and the results obtained in the spheres of noise and vibration transmitted in tunnels and to neighbouring buildings and inside the vehicle, compared with conventional laying on ballast. In conclusion, the author states that: 1) more noise is created by the three experimental types of track without ballast than by track laid directly on ballast; in one case, the provision of a thin upper layer of fine gravel reduces appreciably this difference; 2) from the aspect of vibration transmitted to the tunnel, the three methods give lower vibratory speeds than those created by track laid on ballast, one of them being very definitely more favourable.
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Corporate Authors:
Societe Nationale des Chemins de Fer Francais
92 rue Bonaparte
75 Paris 6e, France -
Authors:
- Colombaud, J R
- Publication Date: 1972-12
Language
- French
Media Info
- Pagination: p. 763
- Serial:
Subject/Index Terms
- TRT Terms: Ballastless track; Noise; Railroad tracks; Technology; Tunnels
- Geographic Terms: France
- Subject Areas: Bridges and other structures; Environment; Railroads;
Filing Info
- Accession Number: 00047774
- Record Type: Publication
- Source Agency: International Union of Railways
- Files: TRIS
- Created Date: Dec 13 1974 12:00AM