UNISSEN PILES CUT CONSTRUCTION TIME

THIS BRIEF ARTICLE GIVES AN ACCOUNT OF THE USE OF UNISSEN PILING IN THE CONSTRUCTION OF A BRIDGE AT SHRIVENHAM TO ALLOW THE ROAD TO PASS UNDER THE RAILWAY AT A FORMER LEVEL CROSSING. THE USE OF THE PILING ELIMINATED ALMOST ALL OF THE TEMPORARY WORKS WHICH ARE REQUIRED IN A CONVENTIONAL REINFORCED CONCRETE CONSTRUCTION AND THE WORK WAS ALSO SPEEDED UP BECAUSE THE UNISSEN SECTION PERFORMED THE DUAL FUNCTION OF SHEET PILE AND BEARING PILE. THIS SYSTEM WAS USED AFTER A FEASIBILITY TRIAL HAD SHOWN THAT TIME COULD BE REDUCED FROM SIX MONTHS TO ONE MONTH. THE SECTION USED WAS COMPOSED OF 533X330X167KG/M UNIVERSAL BEAMS AND LARSSEN 10A AND 10B/20 SHEET PILE. THE BEAMS WERE 16M LONG AND THE SHEET PILES 9.5M. THE WORK WAS COMPLETED IN FOUR WEEKEND POSSESSIONS FROM NOON ON SATURDAY TILL EARLY SUNDAY EVENING. TWO WEEKENDS WERE REQUIRED FOR DRIVING THE UNISSEN SECTIONS AND THE OTHER TWO FOR ERECTING THE REINFORCED CONCRETE BRIDGE GIRDERS. SPEED RESTRICTIONS OF TRAINS WERE LIMITED TO THE PERIODS OF TRACK DISTURBANCE AT THE WEEKENDS AND DURING A SHORT SETTLING IN PERIOD. THE REMAINDER OF THE CONTRACT WORK (EXCAVATION FOR ROAD CONSTRUCTION) WAS CARRIED OUT DURING NORMAL WORKING HOURS WITHOUT DISTURBING RAIL TRAFFIC. IT IS BELIEVED THAT IT IS POSSIBLE TO INSTALL A COMPLETE BRIDGE IN A PERIOD OF 60 HOURS - EFFECTIVELY ONE WEEKEND.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Publication Date: 1974-9

Media Info

  • Features: Figures;
  • Pagination: p. 52
  • Serial:
    • GROUND ENGINEERING
    • Volume: 7
    • Issue Number: 5
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00083361
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 1 1975 12:00AM