This article examines the design and construction of the 29 bridges which are part of the A34 Newbury Bypass in England. Ten of the bridges span the bypass, and the other 19 carry it over a railway, a canal, watercourses, and side roads. Four of the overbridges are composite steel bridges, of which the largest carries the A4 at a 12m clearance, a 25 degree skew, a 60m main span, and two 40m side spans. Donnington Link Bridge carries the northbound carriageway of the old A34 at a 66 degree skew; it has two 40m centre spans, and two 33.5m end spans. The other overbridges have spans ranging from 24m to 37m and continuous in-situ reinforced concrete decks. It was decided to keep the overbridges' appearance simple. The choice of underbridge design depended largely on what obstacles they crossed. The decks of most of them consist of precast, prestressed concrete beams, with Y-beams for longer spans and inverted T-beams for shorter spans. Most of the banks of the rivers crossed were designated as Sites of Special Scientific Interest (SSSIs), so that spans of their bridges were increased to avoid damaging their banks. The bypass construction contract was awarded to Costain in mid-1996, and completed on time in November 1998. The article also discusses detailing, value engineering, concrete construction, and formwork.

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  • Corporate Authors:

    Palladian Publications Limited

    15 South Street
    Farnham Surrey GU97QU,   United Kingdom 
  • Authors:
    • CRAIG, J M
  • Publication Date: 2000


  • English

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Filing Info

  • Accession Number: 00790451
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Apr 11 2000 12:00AM