Features

Our editorial board comprises a specialist group of leading industry figures who, in conjunction with the TUNNELS editorial team, identify the main drivers of the industry helping to produce regular, thought provoking opinion pieces on the latest issues, challenges and developments.

Latest Tunnels Feature

Drill and blast tunneling
25 February, 2021
A form of blasting dating from the pre-explosive’s era involved excavating tunnels by lighting fires at the face and throwing cold water on the hot surface to crack the rock. Later on, blasting...
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Laser scanning covers the points 25 February, 2021 Laser scanning and 3D virtual modelling were critical tools in the refurbishment of a deep shaft on London’s Thames Water Ring Main, resulting in a better foundation for future repair and maintenance. Julian Champkin reports
Lord of the rings 25 February, 2021 A new ring-build system is said to offer health and safety gains, but also cuts ring completion times by around a third - bringing significant cost savings. George Demetri reports
A service limit state design approach for SFRC tunnel linings 25 February, 2021 Sotiris Psomas, Director of Tunnel Structures at Cowie UK, looks at how to estimate mean crack-width for ‘strain-softening’ SFRCs which are usually adopted in tunnel- and shaft-lining applications
Tight Manoeuvres 25 February, 2021 Academia and site-based investigations are being combined in Norway to advance our understanding and performance of high-pressure grouting. Patrick Reynolds reports
Hyperloop: Establishing The Basics 29 January, 2021 In the recent ‘BTS Hyperloop Challenge (Tunnels for Hyperloop)’ report undertaken on behalf of the British Tunnelling Society, Bill Grose outlined the basic requirements for Hyperloop infrastructure. The following is an extract from the report.
Pushing for victory 29 January, 2021 A National Grid project to push a 5km pipeline under an estuary of global importance to wildlife has resulted in the world’s longest pipeline river crossing in a tunnel, safeguarding the UK’s gas supply for a century and earning a place in Guinness World Records. Julian Champkin reports
Hyperbaric interventions 29 January, 2021 Tunnel projects often use compressed air techniques to stabilise the tunnel face. Work in compressed air in tunnels – increasingly referred to as hyperbaric operations – began in the 1830s. Although Lord Cochrane obtained a patent for the concept of using compressed air to stabilise soft or loose-flowing ground at the face of an excavation, it was a Frenchman, Jacques Triger who is credited with first using the technique for shaft sinking in northern France. Around 1874, James Greathead designed a compressed-air shield to construct the Woolwich Tunnel in London.
Fire Performance of PC Segmental Linings 29 January, 2021 Explosive spalling in tunnel linings during fires is often attributed to vapour pressure build-up within the segments. In this article, Stephen Doran suggests that there is another factor at play which is more responsible for the phenomenon
West Link’s Korsvagen Challenges 29 January, 2021 Dr Klaus Rieker of Wayss & Freytag Ingenierbau discusses the various construction techniques and procurement methods used for tunnelling the Korsvägen Section of Gothenburg’s new West Link rail line
Grouting for ground improvement 28 January, 2021 Grouting in underground projects involves the injection of pumpable materials into soil or rock formations to change their physical characteristics. It is one of the most commonly used ground improvement techniques for underground projects and tunnelling applications.
The third way 16 December, 2020 Genoa has a magnificent sea port but desperately poor communications inland. A third route is being developed under the mountains that surround the city. Julian Champkin reports
Design and planning of large-diameter underground surge shafts 16 December, 2020 Rakesh Khali, Group Project Manager, HCC, India, and Naveen Bahuguna, General Manager-Geotech, RIL, India, discuss the design and planning of the support and construction sequences of two shafts in different ground conditions and the monitoring performance during construction


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