JAPAN TRIES GERMAN LAUNCHING SYSTEM

A revolutionary West German deck launching scheme is described involving the repetitive sliding out of precast bridge-deck sections on stainless-steel bearings over the piers. It is claimed that this method halves the conventional construction time. At the piers, deck sections run over ptfe coated plates, themselves sliding across fixed stainless-steel sheeting, the complete assembly having a coefficient of friction of nearly 0.02. The construction of the Sarugaishi bridge described in the article involved the building of a total of 26 single box deck sections 15 M long at a point one span out from the southern abutment at exactly bridge-deck level. The deck section is cast, cured and stressed then launched over the run of piers; a following span is cast behind the first, and connected to it with temporary fixing plates then jacked out behind it. A 20 M long trussed girder was fixed to the leading unit to reduce cantilever movements during launching. Some cracking which occurred at the corners of the deck soffit during launching was prevented by moving the stainless-steel plate inwards by some 100 mm. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03077683
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • Hayward, D
• Publication Date: 1977-7-14

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 18-19
• Serial:
  • NEW CIVIL ENGINEER
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0307-7683

Subject/Index Terms

• TRT Terms: Bearings; Box girders; Bridge decks; Bridge design; Bridge engineering; Bridges; Cantilevers; Coefficient of friction; Construction management; Girders; Launching; Piers (Supports); Piers (Wharves); Precast concrete; Prestressed concrete; Stainless steel; Structural design; Time
• Geographic Terms: Asia; Germany; Japan
• ITRD Terms: 8005: Asia; 3474: Box girder; 3455: Bridge; 3482: Bridge deck; 5460: Coefficient of friction; 3666: Construction method; 8125: Germany; 8053: Japan; 3412: Launching (by sliding); 4792: Precast concrete; 4796: Prestressed concrete; 5414: Time
• Subject Areas: Bridges and other structures; Construction; Highways; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00165660
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Mar 14 1978 12:00AM