Dartford River Crossing Refurbishment, UK

Design of erection gantry, support beams for existing tunnel slab, temporary stools for new tunnel slab and propping to Essex Viaduct deck
Kvaerner Construction
End Client:
Dartford River Crossing (Agent for the Highways Agency)
British Construction Industry Awards 1999

The Dartford River Crossing links the Essex and Kent sections of the M25 Motorway and consists of two tunnels and a bridge. The main elements of the project were the replacement of the East Tunnel carriageway deck and strengthening of the Essex Viaduct support piers.

Tony Gee was appointed as the temporary works consultant. The brief included the mechanical and structural design of the tunnel deck slab erection gantry propping to the Essex Viaduct deck.

The gantry was designed to operate within the height and width restrictions imposed by the tunnel and was used to remove the existing deck slab and install the new 45 tonne slabs.

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 Dartford River Crossing