| NEWS
Second breakthrough on Broadway Subway
VTA secures BART funds US – The State of California has awarded US$375m to the Santa Clara Valley Transportation Authority (VTA) for its BART extension into Downtown San Jose and Santa Clara. The funding is an important step for VTA
to qualify for roughly US$4.6bn of federal contribution, approximately 50% of the estimated project cost. In May 2022, the Kiewit Shea Traylor
joint venture (KSTJV) was awarded the design-build contract for the tunnel and trackwork. KSTJV plans to use an approximately 16.5m-diameter (54.1ft) TBM to bore an 8km-long (5 miles) tunnel under Downtown San Jose. It is the first rail project in the US to be constructed by a single bore, allowing both tracks and station platforms to be constructed within the tunnel. In November last year, an independent
Above: The latest TBM breakthrough for Broadway Subway Extension in Vancouver
CANADA – The Broadway Subway Project Corporation, an Acciona- Ghella joint venture, has made a second tunnel breakthrough on Vancouver’s Broadway Subway Project, which is an extension of the city’s Millennium Line. ‘Phyllis’, one of two Herrenknecht
TBMs constructing twin parallel tunnels for the project, has broken through to the future Mount Pleasant station. Since its launch from Great
Northern Way, last November, TBM ‘Phyllis’ has excavated 2,380ft (725m) of tunnel and erected 494 concrete liner rings along the new section of the Broadway subway. ‘Elsie’, the first of the two
Herrenknecht machines to be launched on this section of the Broadway project, broke through at the future Mount Pleasant station in January. It has since been pulled through the station and in early March was relaunched to drive onward toward the future Broadway-City Hall Station. The Broadway Subway Project
will extend the Millennium Line 3.5 miles (5.7km) from VCC-Clark Station to West Broadway and Arbutus Street, providing a SkyTrain service along the Broadway
corridor. The corridor is home to British Columbia’s second-largest jobs center, a nascent innovation and research hub, and also growing residential communities. Each of the two 493ft-long (150m)
TBMs with backup trains is expected to take approximately one year to dig the 3.1 miles (5km) route distance from Great Northern Way- Emily Carr Station to Cypress Street, near the future Arbutus Station. Progress also continues to be
made at the elevated guideway section of the project, where the Broadway Subway Project Corporation is installing girders to connect the 21 columns between VCC-Clark Station and the future Great Northern Way-Emily Carr Station. Excavation and construction of the station foundations are ongoing at the Broadway-City Hall, Oak-VGH, South Granville and Arbutus sites. The TBMs on the project are
named after Phyllis Munday, a well- known nurse and mountaineer who founded the Girl Guides in British Columbia, and aircraft designer Elizabeth MacGill. The extension line is scheduled to
be brought into operational service in 2026.
peer review, led by the American Public Transportation Association, concluded that a single-bore tunnel was the best option for the project. It said the choice would save construction time, reduce the station footprint and property needs, increase the potential for transit-oriented development, and reduce disruption to communities. The Phase II extension includes 9.6km
(6 miles) of track and four stations to be added to the Phase I 16km (10 miles) alignment from the Warm Springs/South Fremont Station, through Milpitas and Berryessa/North San Jose. The Government has authorised VTA to
advance design and begin certain activities, and early pre-construction activities are planned to get underway shortly for a major construction start in 2024.
Tel Aviv’s TBM launch ISRAEL – Construction has started on Tel Aviv’s light rail Green Line G3-2 section with the launch of the first TBM. The tunneling project, undertaken by
China State Construction Engineering Corporation (CSCEC), comprises a 5.7km- long (3.54 miles) double-lane tunnel, two access sections, one underground station and three other underground structures. CSCEC Israel general manager, Lou Yusai,
said three EPBMs, each of 7.54m-diameter (24.75ft) and 115m (125.8yd) in length, would be employed on the TBM tunneling work. The Tel Aviv Light Rail Project, which
involves the construction of the Red, Green and Purple lines, is the country’s largest government-funded infrastructure project.
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