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Tunneling News

HS2 launches final giant TBM “Karen” for Euston Tunnel as High-Speed Rail enters final boring phase

HS2 has reached a major tunnelling milestone with the launch of its final tunnel boring machine (TBM), named Karen, marking the start of excavation for the second bore of the Euston Tunnel. The 1,624...

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Microtunnelling begins on major wastewater project in Western Sydney

Sydney Water has marked a major construction milestone with the launch of the first tunnel boring machine (TBM) for the Upper South Creek Networks Programme, a large-scale infrastructure project desi...

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Why geotechnical investigations define the success of pipejacking TBM projects

The expansion of renewable energy systems and the need to modernise urban infrastructure are driving a rapid increase in small-diameter tunnelling projects worldwide. These tunnels are widely used fo...

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Stress Meets Structure: Modelling Spalling in Jointed Rock with RS2 and CVBM

Deep underground excavations operate within a narrow margin between equilibrium and failure. As confinement decreases at an excavation boundary, stresses redistribute and concentrate around the openi...

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Shanghai Metro works site sealed after sinkhole opens at Qixin Road

A large sinkhole opened on the morning of 12 February 2026 at the junction of Qixin Road and Li’an Road in Shanghai’s Minhang District, swallowing part of the roadway near an active metro constructio...

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Hong Kong issues tender for 3.6km East drainage tunnel

Hong Kong’s Drainage Services Department (DSD) has invited tenders for the Hong Kong East Drainage Tunnel (Contract No. DC/2026/04), marking the next phase of a major stormwater infrastructure schem...

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Blasting completed on Stockholm Metro Service Tunnel linking Hagastaden and Arenastaden

Blasting works have been completed on a new service tunnel forming part of the Stockholm Metro Expansion programme, marking a key underground construction milestone beneath the Swedish capital. The f...

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Dubai Municipality invites bids for $8.2bn strategic sewerage tunnels project

Dubai Municipality has formally invited bids for the Phase II Links Package of the Dubai Strategic Sewerage Tunnels (DSST) project, advancing one of the emirate’s largest public private partnership...

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China’s TBM rescue beneath the Yangtze

During construction of the Jiangyin–Jingjiang Yangtze River Tunnel, a 6.4 km road tunnel beneath the Yangtze River, a 16 m diameter tunnel boring machine (TBM) suffered a catastrophic failure approxi...

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16,000 m continuous TBM drive sets new overseas tunnelling record in Sri Lanka

On 25 December 2025, a double-shield tunnel boring machine developed by China Railway Construction Heavy Industry Corporation achieved a continuous excavation exceeding 16,000 m at the Upper Elahera–...

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