Latest from Tunnels and Tunnelling


Pawtucket Tunnel excavation completed
21 February, 2024 CBNA-Barletta joint venture CB3A has completed the excavation and lining of the 3.6km Pawtucket Tunnel in Rhode Island.


Focus on active management
24 January, 2024 Three themes among many at the 10th International Symposium of Tunnel Safety and Security (ISTSS), held in Norway last April, were focused on active management – of Safety, Emergency and Evacuation in underground transport. But while themes exist as do disciplines and specialisms, there was also a message of whole systems thinking – to appreciate and work with lies beyond your own discipline for the greater, safer, good
  • Low carbon backfill grout
    Sika is launching a new reduced carbon backfill grout for TBMs, called Sika® Stabilizer-7100 TBM. Mike A. Sposetti, Global Technical Manager (TBM), Underground Construction with Sika Group AG explains the background and provide details
  • Salisbury crash report
    The findings of a study into the train collisions that left carriages jammed inside a tunnel portal near Salisbury in England, in 2021, have been published by the UK’s Rail Accident Investigation Branch (RAIB).
  • Making Headway on Nepal Headrace
    The Robbins double-shield TBM is making good progress despite tough geology and challenges in the Himalayas on the headrace tunnel for the Sunkoshi Marin multi-purpose project, in Nepal.
  • Driving slurry rock tunnelling in small diameters
    A discussion on the latest trends and technologies for small-diameter slurry mechanised tunnelling in rock. This article is based on two papers by Herrenknecht engineers – ‘Rock tunnelling in small diameter: latest trends and technologies’9, and ‘Slurry pipe jacking in hard rock: Pushing boundaries for sustainable infrastructure’