Tunnelling Journal

Tunnelling Journal

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Global coverage of tunnelling and underground construction projects, methods, and equipment.

TBM Cutterhead Lift Marks Milestone on T2D Project
NewsApr 1, 2026

TBM Cutterhead Lift Marks Milestone on T2D Project

The Torrens to Darlington (T2D) Alliance has lifted the first 300‑tonne tunnel boring machine (TBM) cutterhead into the Southern Precinct launch box, marking a key milestone in South Australia’s $15.4 bn infrastructure program. The launch box, built after excavating roughly 120,000 m³...

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Barhale Establishes Toronto Base
NewsMar 31, 2026

Barhale Establishes Toronto Base

Barhale, a UK‑based civil engineering and tunnelling specialist, has launched Barhale Canada Inc in Toronto, marking its first permanent North American base. The new unit will concentrate on clean‑water resilience, stormwater management, and the firm’s Low Carbon Solutions portfolio. Early...

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TBM Assembly Begins on Mumbai’s GMLR Megatunnel
NewsMar 31, 2026

TBM Assembly Begins on Mumbai’s GMLR Megatunnel

Assembly has started on two 14.42‑metre diameter Earth Pressure Balance TBMs for Mumbai’s Goregaon‑Mulund Link Road (GMLR) project, marking India’s largest TBM deployment. The machines, supplied by TERRATEC and managed by J.Kumar‑NCC JV for the Brihanmumbai Municipal Corporation, are being...

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K Line Northern Extension Preferred Alignment Approved
NewsMar 30, 2026

K Line Northern Extension Preferred Alignment Approved

The Los Angeles County Metropolitan Transportation Authority approved the San Vicente‑Fairfax corridor as the Locally Preferred Alternative for the K Line Northern Extension on March 26, 2026. The 6‑7 km underground project will use twin bored tunnels and new stations built...

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TBM Start up on Madrid Metro Line 11 Extension
NewsMar 29, 2026

TBM Start up on Madrid Metro Line 11 Extension

ACCIONA, together with Dragados and Rover, has begun excavating a 5.6 km tunnel for the Madrid Metro Line 11 extension between Comillas and Conde de Casal. The work uses Herrenknecht’s 9.4 m diameter EPBM “Mayrit”, which will install 8.34 m internal‑diameter segmental linings. The...

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Sika Invests in Robotic Rebar Specialist MESH
NewsMar 28, 2026

Sika Invests in Robotic Rebar Specialist MESH

Swiss chemicals group Sika has taken a strategic stake in MESH AG, an ETH Zurich spin‑off that develops robot‑assisted reinforcement manufacturing, as part of a CHF 2.9 million funding round that also includes ABB Robotics and Shimizu Corporation. The investment will fund...

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Four Consortia Enter Dialogue for CPK Airport Tunnel
NewsMar 24, 2026

Four Consortia Enter Dialogue for CPK Airport Tunnel

Four consortia have entered a competitive dialogue to design and build the underground rail station and 6 km tunnel beneath Poland’s Centralny Port Komunikacyjny (CPK) airport. The contract, split into a station‑hub lot and a western tunnel lot, targets award in...

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