VVB

Construction

A3 Hindhead Tunnel

Contract Value £10m
Construction
The A3 Hindhead Project will complete the dual carriageway link between London and Portsmouth and remove a major source of congestion through the town of Hindhead. The centre of Hindhead will be freed from the daily gridlock that occurs in the area, with the result that the project will bring benefi ts to road users, local residents, and the all important environment.

The new road will be 6.5km long and includes 1.8km of twin bored tunnels under the Devil’s Punch Bowl Site. The project will also create a 4.5km continuous route for cyclists, equestrians and walkers, away from main road traffi c, running from Hindhead Crossroads to Thursley Junction.

VVB were appointed by Balfour Beatty to project manage all the mechanical and electrical requirements of the temporary works from inception, installation, commissioning and maintenance through to completion of all aspects of the construction phase of the project.

Our Role included:

  • Early contractual involvement (At tender stage)
  • Value engineering and design
  • Interfacing with the civil and tunneling works
  • Being responsible for electrical safety on the project
  • Providing Senior Authorised, Authorised and Competent Persons for the project
  • Being responsible for the implementation of the HV safety rules and documentation, including the issue of HV safety documents including Switching Schedules, Permits To Work, Sanctions For Test and limitations of Access
  • Supervision of all tunnel crane lifts
  • Management of specialist suppliers and subcontractors

VVB provided all the Temporary Mechanical and Electrical services throughout the construction phase of this project which included the supply of mechanics and electricians on a three shift rolling roster to cover the 24 hour, 7 day project working week.

Our Scope included:

  • Maintenance, breakdowns and repairs of all tunnel plant and equipment including the Batching Plant
  • Installation of the ventilation and it’s ducting throughout the tunnel
  • Assisting with the extensions of the conveyor belt
  • Assembly, fi t-out and maintenance of the concrete lining shutters 
  • Design, installation and maintenance of all power distribution for the project site
  • Installation of LV power throughout the tunnel
  • Providing 11kV HV power throughout the tunnel to operate the major tunnel plant
  • Supply and installation of tunnel lighting
  • Installation and maintenance of communications throughout the tunnel including radio, P.A, telephones and environmental gas monitoring
  • Installation of fi re water mains throughout both of the tunnels
  • Looking after the project offi ces, stores, canteens etc
  • Issuing of Hot Works Permits
  • Temporary steel fabrication works

Work started in January 2007, with the main tunneling excavation works being completed in February 2009 while the secondary concrete lining is due for completion by March 2010. The tunnel is planned to be open for traffic in mid 2011.