Latest from Tunnels and Tunnelling
Necessity fosters innovation
Whether for large- or small-diameter tunnels, utility investment calls for more underground methods, ushering in several innovative techniques in the process. Patrick Reynolds reports.
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Tunneller, lawyer and inventor
John Bartlett was a founder member/chairman of the British Tunnelling Society. He invented the bentonite tunnelling machine, designed the UK stretch of the Channel Tunnel and provided critical input into many other projects. Julian Champkin offers this appreciation of his life.
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Moving to low carbon linings
Benoit de Rivaz of Bekaert claims the inclusion of steel fibres into precast tunnel segments can lead to significant reductions in the CO2 emissions of tunnel linings.
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A 24.1km stretch of the 64km Brenner Base Tunnel has been created with the breakthrough between two lots yesterday.
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Nominations open for ITA Tunnelling Awards
Nominations for the ITA Tunnelling and Underground Space Awards are now open.
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Uinta Basin railway teams announced
Rio Grande Pacific Corporation has awarded the final engineering and construction contracts for the Uinta Basin Railway in Utah.
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Tunnelling restarts on St Louis’ Jefferson Barracks
A specialised Robbins 4.1m diameter main beam TBM has been launched in St Louis, Missouri, to bore Phase 2 of the Jefferson Barracks tunnel.
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United Utilities Water starts pipeline tender process
The tender process for the Haweswater Aqueduct Resilience Programme (HARP) will get under way with a tender launch event in Manchester on June 8.
LATEST FEATURES
An area of outstanding natural beauty, Snowdonia is scarred by unsightly pylons and overhead high-voltage cables. They will now be removed and placed in a new tunnel that forms part of a visual improvement project. Julian Champkin reports
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An improving technology
Once described as a ‘black art’, soil conditioning is today a proven engineering technique. But the question remains, says Alessandro Boscaro of Mapei, of how to attain good technical performance while achieving acceptable environmental sustainability?
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Positive moves for tunnelling sustainability
Moves to deliver sustainability in tunnelling are underway on multiple fronts, including a focus on carbon reduction. Report by Patrick Reynolds
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Tunnels and stations that should be deeper
Dr N Barton (Nick Barton & Associates, Oslo) and M Abrieu (CVA Consortium, São Paulo) expose the false economies and dangers of shallow tunnelling for metros in urban areas, arguing that deeper tunnels and longer escalators are well worth the extra cost
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Notes on compressed air working – Part 2
Following on from his Part 1 article which appeared in the March 2022 issue of T&T, Stephen Doran concludes his discussion of hyperbaric interventions by looking at three major international projects on which they were deployed
