A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Weathering steel bridges for the A34 Chieveley M4 J13 improvement
Remodelling of Junction 13 on the M4 motorway to provide full grade separation for traffic on the A34 dual carriageway involved re-aligning the A34 to pass under the M4 and its slip roads. This was achieved by building 3 km of new dual carriageway whilst retaining the existing at grade roundabout. Five new bridges were needed to carry the slip roads and a local road. As the scheme was procured under a design and build contract, tenderers were incentivised to come up with bridge designs that gave the lowest capital cost, lowest whole life cost, and shortest construction period. Consequently these bridges are amongst the first highway bridges to be built in the UK using weathering steel since the reduction in the standard minimum headroom requirement by the UK Highways Agency. The paper describes their design and construction. The design, economics and buildability issues covered include ladder deck and multi-girder steelwork systems, integral construction, whole life costing and use of permanent formwork and proprietary cantilever formwork. Construction issues include the fabricator's use of solid modelling techniques to feed automated manufacturing processes and turn the designs into fabricated steelwork ready for erection.
Weathering steel bridges for the A34 Chieveley M4 J13 improvement
Remodelling of Junction 13 on the M4 motorway to provide full grade separation for traffic on the A34 dual carriageway involved re-aligning the A34 to pass under the M4 and its slip roads. This was achieved by building 3 km of new dual carriageway whilst retaining the existing at grade roundabout. Five new bridges were needed to carry the slip roads and a local road. As the scheme was procured under a design and build contract, tenderers were incentivised to come up with bridge designs that gave the lowest capital cost, lowest whole life cost, and shortest construction period. Consequently these bridges are amongst the first highway bridges to be built in the UK using weathering steel since the reduction in the standard minimum headroom requirement by the UK Highways Agency. The paper describes their design and construction. The design, economics and buildability issues covered include ladder deck and multi-girder steelwork systems, integral construction, whole life costing and use of permanent formwork and proprietary cantilever formwork. Construction issues include the fabricator's use of solid modelling techniques to feed automated manufacturing processes and turn the designs into fabricated steelwork ready for erection.
Weathering steel bridges for the A34 Chieveley M4 J13 improvement
Brücken aus witterungsbeständigem Stahl zur Verbesserung der Verbindung J13 zwischen der A34 und der M4 bei Chieveley
Place, J.D. (author) / Dickson, D.M. (author) / James, D. (author)
2006
10 Seiten, 15 Bilder, 1 Tabelle, 7 Quellen
Conference paper
English
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