VVB

Road - A406 Fore Street

A406 Fore Street Tunnel M&E Refurbishment

Mechanical & Electrical Refurbishment

Contract Value £7.2m

Fore Street Tunnel is located on the A406 North Circular Road between Edmonton and the Great Cambridge Roundabout in North London serving more than 100,000 vehicles per day. The tunnel is 361 Metres long constructed as 2 parallel bores which run in an East to West direction.

The purpose of the project was to carry out major improvement works on the tunnel to improve lighting, ventilation and structural repairs to weatherproof the tunnel. BAM Nuttall were the main contractor completing the civil works associated with water management. Due to the ingress of water the existing mechanical and electrical services had suffered degradation. VVB were appointed as the mechanical and electrical contractor to design and build a new infrastructure covering the installation of the temporary lighting system and power distribution during construction works.

The permanent electrical works completed by VVB were comprised of the permanent LED lighting and associated controls, the refurbishment and replacement of switchgear, the installation of the Cable Management Systems (CMS), Emergency Distribution Panels (EDP) and driver cabinets. Works related to telecommunications and data systems included the replacement of communication systems and CCTV, the replacement of supply cables to external services, such as the gantries, footpaths, subway lighting and the pumps.

Systems included within the project scope

  • Temporary Lighting System and power distribution during construction works
  • Permanent LED Lighting & associated controls
  • Replacement Switchgear
  • Cable Management Systems
  • Refurbishment of Switchgear
  • Installation of EDP + Driver Cabinets
  • Replacement Communications systems including CCTV
  • Replacement of the existing Fire Main (including Trace Heating, Lagging & Fire Hydrants)
  • Replacement of Signage including Way‐finding Signs, SOS Signs
  • Replacement of supply cables to external services (Gantry’s, Footpath/Subway Lighting and Pumps)
  • Installation of new Fire cladding system
  • Replacement of Tunnel Emergency Telephone System
  • Replacement of the VMS System
  • New linear heat detection system

VVB were also involved in the replacement of the existing fire main, including its trace heating, lagging and the fire hydrants, fire suppression, fire doors, fire cladding and the heating ventilation and air conditioning (HVAC). Other aspects of the work covered traffic signage and emergency points, such as SOS signage and telephone
points and the Variable Message Signage (VMS). The work commenced in October 2014 and were completed for handover in early July 2015.

“VVB’s degree of professionalism, collaborative approach, organisation and competence has allowed the project to achieve the success that is being widely recognised within TfL’s STIP Framework…”
“…I would like to thank VVB for their hard work and helpful attitude that has led to a successful project and good morale among the team.”

— Project Manager, Principal Contractor BAM Nuttall