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/

Media Info

  • Features: Figures; References;
  • Pagination: p. 18-19
  • Serial:

Subject/Index Terms

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