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New Tyne Crossing

VolkerStevin was responsible for the manufacture, flotation and submersion of 4No 90m long pre-fabricated tunnel units using immersed tube engineering techniques.

The units were constructed in a formerly derelict dry dock at the Wallsend and floated the 3km down the Tyne before being sunk into a prepared trench adjacent to the existing tunnel.

We had to prepare the base of the dry dock by levelling and profiling a sand and gravel formation layer prior to laying ply boards.

Each of the 8600t tunnel sections were 90m long by 15m wide and 8.5m high and had three cavities: -

  • Main Vehicle Access
  • Emergency Escape Route and
  • Services Tunnel

The walls and roof pours took 16 hours to complete and required specially designed cooling systems within the pours to control heat loss/gain and any subsequent cracking.

We have delivered the project on programme and within the client's specified budget.'

Key Quantities include:

  • 100 Strong Workforce
  • 14,400m3 of Concrete and
  • 3,400 tonnes of reinforcement

Facts and figures

  • Client:
    Tyne & Wear Integrated Transport Authority
  • Value:
  • Commencement date:
    April 2008
  • Completion Date:
    March 2010
  • Form of contract:
    Bouygues - Bespoke form of contract
  • Project categories
    Civil engineering

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