Latest from Tunnels and Tunnelling
Varied tunneling challenges in BC
Two tunneling projects in British Columbia present Acciona with quite different excavationchallenges – Broadway metro extension, in Vancouver, and BC Hydro’s Site C
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Tunneling under operating highways and railways: Part 2
Keivan Rafie and Gary Kramer of Hatch present the second of their two-part look at lessons in planning and constructing tunnel crossings with shallow cover under live transport corridors
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Single pass solution for Ecuador sewer
For a pressurised sewer project in Ecuador, long pipe jacking drives with MTBMs were key to constructing a single-pass hybrid lining. Bernard Catalano of Bessac Canada describes the challenge and choices
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The three finalists for this year’s Harding Prize will present their papers at the British Tunnelling Society’s (BTS) April meeting.
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Central Interceptor project completes tunnelling for first link sewer
A micro-TBM on Auckland’s Central Interceptor project has broken through to complete Link Sewer C – the first of two connecting sewers to the main tunnel.
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HS2 delay and Euston revisions will add costs, says NAO
The government’s two-year pause on parts of HS2 will create additional costs and a potential higher price overall, according to the public spending watchdog.
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Two 15.01m Slurry TBMs of CRCHI Break through on Two Projects
On Mar 12th, the largest slurry TBM in China’s Hunan Province broke through, which marks the completion of the right line tunneling of the Xiangya Road river-crossing tunnel in Changsha City and represents that the largest diameter shield machine tunnel in Hunan Province has achieved twin-tunnel through. The 15.01m slurry TBM ‘Xingsheng’ is manufactured by China Railway Construction Heavy Industry Corporation Limited (CRCHI) and launched on Mar 30,2021.
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UK’s largest TBM rotated in reception chamber
Engineers working on London’s Silvertown Tunnel have used nitrogen ‘skates’ to rotate the first section to the TBM in the reception chamber.
LATEST FEATURES
Utility tunnels are among key underground investments in two major Canadian cities – Toronto and Vancouver
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Succeeding in the shadows
Surveying and scanning have been combined to build New Zealand’s first underground railway. Report by Mary Jo Wagner
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Shields at the ready
With multiple TBM tunnelling projects constantly in preparation or underway globally, T&T briefly spotlights a few from the last couple of years
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Single pass solution for Ecuador sewer
For a pressurised sewer project in Ecuador, long pipe jacking drives with MTBMs were key to constructing a single-pass hybrid lining. Bernard Catalano of Bessac Canada describes the challenge and choices
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Two tales of technology
Recent technology successes for Robbins include an award-winning conversion of a TBM diameter while underground, and continuing to see the difference the robust McNally support system delivers for excavations in difficult ground
