Latest from Tunnels and Tunnelling
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’Read more
CBNA-Barletta joint venture CB3A has completed the excavation and lining of the 3.6km Pawtucket Tunnel in Rhode Island.
Campaigners lose High Court bid to stop Stonehenge tunnel
Campaigners have lost a High Court challenge against the proposed Stonehenge road tunnel.
Strabag wins Eglinton Crosstown West Extension – Advance Tunnel 2 contract
Infrastructure Ontario (IO) and Metrolinx have awarded a fixed-price contract of C$255m to Strabag to design, build and finance the second underground segment of the Eglinton Crosstown West Extension.
First heavy construction contract awarded for Hudson Tunnel
The Gateway Development Commission has awarded the Hudson River Ground Stabilisation (HRGS) Project to Weeks Marine, marking the first heavy construction contract for the Hudson Tunnel Project (HTP).
TBM makes good progress on Vishnugad-Pipalkoti Hydropower project
Hindustan Construction Co is making good progress on India’s Vishnugad-Pipalkoti Hydropower project, excavating 431m in January.
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’