Features Archive

Archive of features from the global tunnels industry

Features By Date

February 2024


Robert Mair – Interview
28 February 2024 Few in the tunnelling world are known to the general public, fewer still are profiled in a broadcast programme such as on BBC’s prestigious ‘The Life Scientific’ on Radio Four. In fact, only one has been accorded that mark of public recognition and interest – Robert Mair, Emeritus Professor of Civil Engineering at Cambridge University, and recent Master of Jesus College there, and is past-President of the Institution of Civil Engineers.

Resilient underground design and systems
27 February 2024 The need for subsurface spaces to be more sustainable and resilient was the focus of an ITA report published last year which, in considering ‘Urban Underground Space for Resilient Cities’, looked at need, strategies, design concepts to address the challenges

Technological Innovation Drives The High-Quality Development Of The Shenzhen Metro
27 February 2024 Under the guidance of the innovation-driven development strategy, Shenzhen Metro is undergoing a transformation in its development model, transitioning from rapid expansion to a focus on highquality development.

Delving Deep: Rethinking Underground Use
27 February 2024 Rethinking Our Cities using the Underground Space’ was the important theme of a dedicated collaborative event hosted in Porto, Portugal, by the Portuguese tunnelling society (CPT), in Nov 2023, and moderated by ITACUS Co-chair Antonia Cornaro, Expert Underground Space with Amberg Engineering as well as lecturer on Planning of Underground Space at ETH Zurich. In this article, she describes and summarises the key points of the interesting discussion.

Norwegian tunnels stats update: 2023
26 February 2024 Latest annual data update on tunnelling activity in Norway shows another year of higher activity overall and another year of changes in who is most active

Validity of The NTNU Prediction Model for D&B Tunnelling
26 February 2024 A number of predictive models for tunnelling works were established some decades ago by Norwegian researchers and continuously improved to better fit modern trends. This paper examines one such model, for Drill & Blast, against a range of recent project data from across the country. The findings demonstrate that while the empirical methodology is still highly relevant some further improvements, and additional empirical relations, are suggested to accommodate 16 years of development in technology, equipment, contractual issues and blast design

January 2024


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

Salisbury crash report
24 January 2024 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).

Low carbon backfill grout
24 January 2024 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

Making Headway on Nepal Headrace
24 January 2024 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
24 January 2024 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
22 January 2024 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
22 January 2024 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
22 January 2024 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

December 2023


Crossrail learning legacy – ongoing impact
29 December 2023 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
29 December 2023 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)

Is benchmarking the answer?
29 December 2023 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

Roger Remington
29 December 2023 Roger Remington made his mark on and was honoured by the UK tunnelling industry for the wide range of projects he steered as client and also procurement changes introduced. This is a celebration of how his contribution was recognised and appreciated, and the legacy that continues to be recalled after Roger died, earlier this year

Inside the convergence of BIM and digital twins
29 December 2023 Tor Erik Djupos, application engineer with Trimble, discusses the influence and convergence of BIM and Digital Twins for infrastructure assets

Design automation of Kalvebod tunnel settlement assessment
29 December 2023 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