THE ORWELL BRIDGE

The bridge, forming part of the A45 Ipswich bypass has an 18 span structure of total length 1286M, incorporating the largest prestressed concrete span in the United Kingdom, 190M long across the main navigation channel of the River Orwell. A cast in-situ balanced cantilever, single cell box girder design was adopted for the navigation spans using 160M long anchor spans adjacent to the 190M central section. Approach viaducts, also in cast in-situ prestressed concrete are of 59M span except for one of 46M and another of 72M. As the navigation channel clearance is 41M, the bridge is considerably higher than the surrounding land, and will be used by an estimated 23 000 vehicles (27 per cent hgv) per day. All piers have bored pile foundations up to 40M deep into the stiff clay and sands over the horizontal surface of chalk. Twin stalk piers are used on the viaduct and the single piers on either side of the navigation channel are hollow over the middle third of their height. There are excellent inspection facilities for both inside and outside of the box and the bearings of the piers. Details are also given of the roadworks which are of dual, two lane carriageway designed to near motorway standards. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03066452
• Corporate Authors:

  Whitehall Press Limited

  Headington Hill Hall
  Oxford 0X3 0BW,   England 
• Publication Date: 1983-1

Media Info

• Features: Figures; Photos; Tables;
• Pagination: p. 20-26
• Serial:
  • Highway Engineer
  • Volume: 30
  • Issue Number: 1
  • Publisher: Whitehall Press Limited
  • ISSN: 0306-6452

Subject/Index Terms

• TRT Terms: Box girders; Bridge bearings; Bridge members; Bridge piers; Bridges; Cantilevers; Cast in place concrete; Cast in place structures; Chalks; Clay; Design; Foundations; Length; Long span bridges; Pile foundations; Prestressed concrete; Sand; Support piles; Surveillance; Traffic lanes
• Uncontrolled Terms: Bridge spans
• Geographic Terms: United Kingdom
• Old TRIS Terms: Bored pile
• ITRD Terms: 3415: Bearing (bridge); 3474: Box girder; 3455: Bridge; 3434: Bridge pier; 2992: Carriageway; 4781: Cast in situ concrete; 4120: Chalk; 4177: Clay; 9011: Design (overall design); 3377: Foundation; 3399: Pile; 4796: Prestressed concrete; 4105: Sand; 3452: Span; 9101: Surveillance; 8119: United Kingdom
• Subject Areas: Bridges and other structures; Construction; Design; Highways; Pavements; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00373313
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 30 1983 12:00AM