Features Archive

Archive of features from the global tunnels industry

Features By Date

September 2021


Set in stone
07 September 2021 For centuries the home of quarrying and more recently mining of the eponymous stone, Portland, England could become home to an exciting new visitor attraction housed in a mine and demonstrating the potential of underground space. George Demetri reports

Closed form tunnel analysis methods
07 September 2021 In the first of a series of articles, Stephen Doran looks at closed-form tunnel analysis methods, their background and how they can provide an insight into the underlying assumptions used in software

Tunnel vision
07 September 2021 TunnelSkills – the national specialist training forum for the UK tunnelling industry – specialises in the application of immersive learning and new technology to improve training, learning and recruitment in the sector

NATM through challenging fault zones
07 September 2021 Ryo Kashiwagi of Japan Railway Construction, Transport and Technology Agency (JRTT) discusses the challenges from tunnelling the double-track Shinkansen railway which is close to an existing highway tunnel in an extremely soft fault crush zone

Sustainable solutions
07 September 2021 Arnaud Hochart, geotechnical and monitoring manager at Implenia, discusses the technical challenges encountered on Lyon’s Metro B Line extension, including the open-pored, high-permeability alluviums with the associated risks of slurry loss and ground instability

A focus on efficiency within tunnel ventilation
02 September 2021 Worldwide, electric motors represent around 50% of global electricity consumption (EU). The need to achieve a more sustainable environmental future clearly requires focus on the subject of motor efficiency. Any gains in motor efficiency will have a directly influence on the fight against climate change through reducing global electrical consumption and related CO2 emissions.

August 2021


Cool talk on Hinkley Point C
12 August 2021 Matthew Fowler of Balfour Beatty gave June’s British Tunnelling Society online lecture on the offshore cooling water tunnels at Hinkley Point C nuclear power station and the offsite construction of some of the critical components. Report by Ana Barbosa of Jacobs

Learning from Istanbul
12 August 2021 Prof Dr Nuh Bilgin, Chairman of the Turkish Tunnelling Society, and Sinan Acun, TBM Group Manager, Kolin-Kalyon-Cengiz Joint Venture discuss the lessons learnt in the complex geology of two EPB-TBM drives to the new Istanbul Airport

Spraying for success
12 August 2021 Dr Alun Thomas of All2plan Consulting outlines some of the rudiments of sprayed concrete and gives a few tips that could prove useful to young engineers – and maybe to those not so young

Testing time for FRS permanent sprayed concrete linings
12 August 2021 Benoit de Rivaz of Bekaert outlines a few test methods used to evaluate the behaviour of fibre-reinforced shotcrete for permanent sprayed concrete linings and how their results can optimise design and construction processes

Water mist systems and Road tunnel ventilation
12 August 2021 Ingo Riess of Riess Ingenieur, Zurich, Switzerland, discusses the benefits and effects of water-mist systems on tunnel fires in road tunnels

Keeping tunnels safe
12 August 2021 The critical role played by certified smoke extraction motors in keeping tunnels safe is explained by Pekka Uusitalo, Key Account Manager for ABB Motors and Generators

July 2021


Getting the right fix
27 July 2021 Panos Spyridis, engineer and professor of fastening and assembly technologies at the Technical University of Dortmund, Germany, clarifies various aspects of the design, specification and installation of fixings for tunnel projects

Delivering Selina
27 July 2021 Shannon O’Keeffe, Senior Tunnel Agent for Costain Engineering looks at the complex logistics that were initiated to ensure the successful delivery of a TBM to a Thameside site for the boring of Tideway (Eastern Section)

Florence and Cecilia set off
27 July 2021 HS2 is the largest transport infrastructure project in Europe. Julian Champkin had a lightening tour of the Chiltern Tunnel portal to see the first of the ten TBMs that will work on the project’s 51km twin-tunnels

Factory for Fehmarn
27 July 2021 Main construction has started at Fehmarn for the world’s longest immersed tube tunnel. Report by Patrick Reynolds

A novel concrete arch pre-support system
27 July 2021 Ehsan Azadi of Tehran-based Pajoohesh Consulting Engineers discusses the behaviour of surface settlement using numerical simulation methods (Plaxis 2D and 3D) in a hardening soil model and the use of a new concrete arch pre-support system (CAPS) on Line 2 Metro, Mashhad

June 2021


All-In-One Survey Solution Drives Efficiencies, Accuracies During Construction
25 June 2021 Like others in the infrastructure construction space, tunnel contractors are under increasing pressure to deliver projects faster to meet the needs of growing communities. History has shown that speed, accuracy and above all safety in these highly complex endeavors can only be achieved with help from technology, for both surveyors and contractors.

Groundwater control for tunnelling projects
18 June 2021 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

Seeing the invisible
18 June 2021 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