All articles by Staff Writer
Staff Writer
Riyadh awards metro extension contract
The 8.4km Red Line extension includes 7.1km of tunnelling.
Breakthrough made on Mumbai-Ahmedabad high-speed mountain tunnel
Breakthrough has been achieved on a 1.5km mountain tunnel on India’s Mumbai-Ahmedabad high-speed railway line.
Implenia/Marti JV secures Swiss rail work
An Implenia and Marti joint venture has won five of the six main lots – including construction of the 8.3km Brüttener tunnel – of Switzerland’s MehrSpur Zurich-Winterthur project.
BTS January lecture: the design and construction of large propless openings for HS2 tunnels
The British Tunnelling Society’s January lecture this week will explore the design and construction of large propless openings in segmentally lined tunnels using special segments for HS2.
CRCHI Delivers Another Super-large Diameter TBM
A super-large diameter TBM “Longgang No.2”, featuring the “Pioneer Ox” motif painted on its cutterhead, rolled off the production line at CRCHI. The equipment will be deployed for the Longgang Tunnel Project of the newly-constructed Shenzhen-Shenshan Special Cooperation Zone Railway, marking a new addition to the tunneling supporting the under-construction 350 km/h high-speed rail projects in the Guangdong-Hong Kong-Macao Greater Bay Area of China (GBA).
16,000 Meters: CRCHI TBM Sets New Overseas Record for Longest Single-Heading Excavation with a Double-Shield TBM
On Dec 25, at the Upper Elahera–Hela Canal Water Transfer Tunnel Project in Sri Lanka, a double-shield TBM featuring a combined “segment lining + rock bolting and shotcreting” support system, independently developed by China Railway Construction Heavy Industry Corporation Limited (CRCHI), achieved continuous excavation of more than 16,000 meters without any intermediate inspection shaft. The breakthrough successfully surpassed the 10,000-ring milestone, setting a new overseas record for the longest single-heading excavation using a double-shield TBM.
Notice of Issuance: RFP 25-10 for Progressive Design-Build Civil and Tunnel Construction (40-CT)
This notice serves to inform interested parties that the Transbay Joint Powers Authority (TJPA) has issued Request for Proposals (RFP) #25-10 for Progressive Design-Build Civil and Tunnel Construction (40-CT) for the Transbay Portal (Project) to the shortlisted firms selected through 23-04 Request for Qualifications (RFQ) Progressive Design-Build Civil and Tunnel (Proposers).
West Gate Tunnel opens on Sunday
Melbourne’s West Gate Tunnel will open to traffic on December 14.
Madrid Metro TBM assembly begins
Assembly of the TBM that will dig Madrid’s Metro Line 11 has commenced.
Sydney Metro West TBMs dismantled
The retrieval of two TBMs is under way at Sydney Metro West’s Westmead station and the cavern lining has been completed.