Features Archive

Archive of features from the global tunnels industry

Features By Date

August 2023


Designing in Fire Safety Through Simulation
25 August 2023 Florian Michelin, Ventsim Manager, Howden, discusses approaches to simulating the complex variables at play in fire incidents in tunnels, and so help to design effective ventilation systems as part of fire safety measures

Grouting Focus in Stockholm
25 August 2023 The second half of the year’s tunnelling industry events commence with the latest Nordic Grouting Symposium to be held in Stockholm, over two days and packing in a course plus site visits

BTS James Clark Medal Award: Andy Alder
21 August 2023 Andy Alder has been awarded the James Clark Medal by the British Tunnelling Society for his service and leadership in the industry.

Smoke control in road tunnels
21 August 2023 To minimise smoke propagation in tunnels, ventilation design has seen the distributed extraction approach give way to local extraction systems for new tunnels. Ingo Riess, of Riess Ingenieur-GmbH, in Zurich, Switzerland, discusses the change, its effectiveness, but also the challenges that come in the complexity of the new approach.

Drives in tunnels
21 August 2023 Variable speed drives (VSDs) offer benefits to control ventilation fans and drainage pumps in tunnels, explains Josh Paikada, Strategic Business Development Manager, ABB.

July 2023


Grey cast iron linings – new structural insights
24 July 2023 The Harding Prize Competition is named after the founder of the British Tunnelling Society, Sir Harold Harding, and is for entrants under the age of 33. Shortlisted papers were presented to the BTS evening meeting on 13 April, at the Institution of Civil Engineers, in London. Agustín Ruiz López, postdoctoral researcher with the Department of Civil and Environmental Engineering, Imperial College, London, was a runner-up in this year’s Competition with a paper entitled ‘New insights into the structural behaviour of grey cast iron tunnel linings’. It is published here with the author’s permission

Geopolymer concrete in tunnelling
24 July 2023 At the monthly BTS meeting at the Institution of Civil Engineers, in London, in March 2023, John Day, Chief Technical Officer of Wagners EFC Pty Ltd, Charles Allen, Director of OTB Concrete, and Richard Sutherden, Engineering Director with Murphy for the HMJV (Hochtief- Murphy Joint Venture) provided perspectives on the use and future potential of geopolymer concretes, and the Earth Friendly Concrete in particular, in underground applications

Waste disposal: engineering the key nuclear challenge
24 July 2023 Scientists agree that geological disposal is the best solution when considering the very long-term storage of high activity nuclear waste materials but to develop such a massive engineering project requires community buy-in from the get go. By Steve Reece, Head of GDF Siting at Nuclear Waste Services

Formwork for Fehmarn
24 July 2023 Peri has delivered 10,000 tonnes of special large steel formwork for the massive concreting operation needed to construct the world’s longest subsea immersed tube tunnel, as the core infrastructure of the Fehmarn Project, to link Denmark and Germany

Cross river truss lift challenge
24 July 2023 Mammoet’s heavy lift work helped get concrete trusses in place for a below ground station on Cross River Rail project, in Brisbane, Australia

Carbon saving push boosts PSCL development
24 July 2023 Carbon saving is a new boost to further development of Permanent Sprayed Concrete Lining (PSCL), says Benoit de Rivaz, technical director for Bekaert BP Underground Solutions

ITA guide on spoil handling
24 July 2023 Key points on working with spoil from all types of tunnelling was issued as further guidance last year from ITA’s Working Group 14 (Mechanized Tunnelling – Task Group 4), building on earlier work. A summary review is presented

Looking very deep for disposal
24 July 2023 Conventional thinking suggests nuclear waste should be disposed of in deep geological repositories not much more than a few hundred metres below ground. Deep directional drilling techniques pioneered and now mastered by the oil and gas industry offer are alternative solution. By Dr. Henry Crichlow, founder and CEO of NuclearSAFE Technology LLC

June 2023


Packed schedule in Boston
28 June 2023 TTNA previews the packed program for RETC 2023, in Boston, MA, in June

Breakthroughs on Broadway
28 June 2023 Tunneling is well underway with multiple early TBM breakthroughs on the Broadway Extension to the Millennium Line, in Vancouver

How to develop your tunnelers
28 June 2023 The BTS Design and Construction course has special flagship standing in tunneling education and the 1-week course runs this July again. Mike King, of MK Tunnelling, gives an insight and recommends ambitious tunnelers to attend

Headway at Hudson
28 June 2023 The Hudson Tunnel Project, which will improve the rail link between New Jersey and New York, has moved from planning into procurement

Small bores, big impacts
28 June 2023 Views shared with TTNA on the trends and advances in the trenchless and microtunneling markets

Latin drives
28 June 2023 A variety of tunneling projects in Latin America are meeting key milestones in their progress, and TTNA takes a brief look at a few, in Peru and Brazil

Toronto spotlights
28 June 2023 TTNA spotlights a recent few milestones and interesting project developments in Toronto that have among them presented a variety of engineering challenges