Focus on active management
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...
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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’
Advancing with shields in India
Terratec machines are busy in India, including successfully advancing on the metro project in Chennai and on Mithi River water quality improvement project in Mumbai
Data focus on rail & metro tunnels
Courtesy of GlobalData, a sister publication of T&T, we take a look at tunnel-based infrastructure project spend which is dominated by the transport sector, itself led in activity by rail & metro, based on figures from the Q3-2023 analysis
China at successes and WTC 2024 preparations
The latest ITA Awards held many plaudits for tunnel projects in China, which is shortly to host the next World Tunnel Congress (WTC 2024), in Shenzhen, in mid-April, and will feature many large projects from across the country in addition to presentations by international tunnellers
Crossrail learning legacy – ongoing impact
The knowledge pool from Crossrail will live on for education on project development and execution, including tunnel excavation and underground station construction works, after Transport for London this year decided to keep the online library of the project (now the Elizabeth line) free and available
Segment accessories and you
For use of accessories with segment lining, Christoph Eberle, Technical Director, Mott MacDonald, discusses assurance in the context of Load and Resistance Factor Design (LRFD)
Design automation of Kalvebod tunnel settlement assessment
Design automation is evolving to include the integration of discipline specific software and the use of scripting tools to create workflows that allow the design to start earlier when input parameters are less refined. This means design changes can be easily accommodated, which gives increased value to the client, output quality, consistency, time, and cost savings
Is benchmarking the answer?
Martin Paver is immersed in project data and its challenges. He heads Projecting Success, a training and advocacy body, focused on ‘Transforming Project Delivery’ through accelerating the construction industry’s engagement with data analytics. A core issue, he contends in the growing era of digital construction, is the debate needed over data gathering, ownership and governance. For T&T, he discusses the approach for data to be an accessible, shared and powerful resource to leverage benefits in project by considering the merits of data trusts