DESIGN AND CONSTRUCTION CONTROL OF BALLASTED TRACK FORMATION AND SUBGRADE FOR HIGH SPEED LINES

The first 75km section of Channel Tunnel Rail Link (CTRL) project, a new high speed railway between London and the Channel Tunnel, is currently under construction in Kent. The earthworks and trackbed layers for the CTRL have been designed in accordance with the International Union of Railways (UIC) Code 719R together with French TGV best practice. The UIC code recommendations for high speed lines are largely based on extrapolating to higher speeds an empirical and prescriptive approach developed from experience on main lines (i.e. up to 200 km/h). To give more assurance to the extrapolated use of UIC Code 719R for high speed lines, analytical and experimental work was carried out including a knowledge of the resilient modulus of the subgrade and for less common soils such as chalk, laboratory determination of the resilient modulus. This paper describes the laboratory cyclic triaxial testing carried out to determine the resilient modulus of chalk recovered from the CTRL route. It also describes the various sets of plate loading tests carried out on site under dry and flooded conditions to confirm the adequacy of this test type. Recommendations are put forward for design and construction control of the trackbed layers for future new high speed lines. For the covering abstract see ITRD E123713.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0947644458
• Corporate Authors:

  ENGINEERING TECHNICS PRESS

  46 CLUNY GARDENS
  EDINBURGH,   United Kingdom  EH10 6BN
• Authors:
  • O'RIORDAN, N
  • Phear, A
• Publication Date: 2001

Language

• English

Media Info

• Features: References;
• Pagination: 13 p.
• Serial:
  • PROCEEDINGS OF THE INTERNATIONAL CONFERENCE RAILWAY ENGINEERING 2001, HELD LONDON, UK, 30 APRIL - 1 MAY 2001 - CDROM
  • Publisher: ENGINEERING TECHNICS PRESS

Subject/Index Terms

• TRT Terms: Chalks; Conferences; Construction; Design; Earthwork; High speed ground transportation; High speed vehicles; Loads; Modulus of elasticity; Railroad tracks; Speed; Subsoil; Test procedures
• ITRD Terms: 4120: Chalk; 8525: Conference; 3655: Construction; 9011: Design (overall design); 3653: Earthworks; 1163: High speed; 5567: Load; 5919: Modulus of elasticity; 1062: Railway track; 2930: Subsoil; 6288: Test method
• Subject Areas: Construction; Design; Railroads;

Filing Info

• Accession Number: 00985509
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-947644-45-8
• Files: ITRD
• Created Date: Feb 4 2005 12:00AM