Details are given of Hunton Bridge - Maple Cross section (A41/A411 to A412) of the North Orbital road in Hertfordshire. The contract is 7.5 km long. Concrete paving is being carried out in two abutting widths of 7.15M to make up a total of 14.3M comprising three traffic lanes and integral hard shoulder. Conventional railed side-form paving train equipment is being used; the 280mm thick unreinforced concrete slab is being concreted in two courses, with air entrainment only for approximately the top 90 mm of concrete. As a transport and Road Research Laboratory experiment, a short section of carriageway is to be constructed with narrow wet-formed contraction joint grooves unsealed and incorporating plastic-coated and bitumen-coated dowel bars. There are 23 structures, the largest of which is a 238M viaduct, consisting of two separate but identical seven span structures. Each deck comprises six precast, prestressed concrete trough beams with 150mm thick in situ concrete deck slab cast over the trough beams. The deck sections are supported on 8M long in situ 'table-top' slabs, each carried on four 1 M diameter columns on spread footings founded in chalk. /TRRL/

  • Corporate Authors:

    IPC Building and Contract Journals Limited

    32 Southwark Bridge Road
    London SE1 9EX,   England 
  • Publication Date: 1975-10-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00132269
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 13 1976 12:00AM