Latest from Tunnels and Tunnelling


Positive start to Vancouver subway extension
17 June, 2021 Having only begun last month, construction is now in full swing on Vancouver’s Broadway Subway Project – a 5.7km extension of the Millennium Line that will run almost entirely underground.
  • Norway’s longest subsea tunnel is part of mammoth road scheme
    NPRA – the Norwegian Public Roads Administration – is inviting contractors, subcontractors and consultants to an online information meeting concerning the E39 Ålesund-Molde road improvement project which includes the construction of the country’s longest subsea tunnel. The meeting will be held over Microsoft Teams on 21 June.
  • Sky-high salaries agreed for West Gate tunnellers
    Following the successful conclusion of a pay deal between the contractor and a local building union, tunnellers working on the US$5.2bn West Gate Tunnel project in Melbourne, Australia, look set to earn more than US$240,000 a year.
  • Bids invited for Phase 4 section of Delhi Metro
    Delhi Metro Rail Corp (DMRC) is inviting international bids for the design and construction of twin TBM-bored tunnels, cut and cover, plus underground ramp and other tunnel-related works for package DC-05 of Delhi Metro’s Phase 4.
  • Twin-tunnel win for Webuild consortium
    An Italian consortium comprising Webuild (70%) and Pizzarotti (30%) has been announced best bidder for the US$445m design-build Orsara-Bovino contract which includes significant tunnelling.


Geothermal energy from safe rock zones
17 June, 2021 Writing for the Swiss Federal Office of Energy, Dr Benedikt Vogel looks at recent research aimed at enabling better and more efficient methods of extracting geothermal energy
  • Seeing the invisible
    Dr Andrius Rimsa, Loxus Consulting and Mikko Simola of Loxus 3D Tunnel inspections discuss the inspection and maintenance of flooded rock tunnels using ROVs with 3D sonar
  • Crossing the roads
    The Hampton Roads Bridge-Tunnel expansion scheme will bring new life to the most congested route in Virginia. Julian Champkin reports
  • Groundwater control for tunnelling projects
    Dr Martin Preene discusses the various dewatering techniques that are available for tunnels and shafts where uncontrolled groundwater ingress could cause disruption and increase costs