Latest from Tunnels and Tunnelling


Harding Prize lecture set for April
28 March, 2023 The three finalists for this year’s Harding Prize will present their papers at the British Tunnelling Society’s (BTS) April meeting.
  • 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.


Vital tunnels for utilities
16 February, 2023 Utility tunnels are among key underground investments in two major Canadian cities – Toronto and Vancouver
  • Succeeding in the shadows
    Surveying and scanning have been combined to build New Zealand’s first underground railway. Report by Mary Jo Wagner
  • 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
  • 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
  • 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