On behalf of JIM Technology (JIMT), TERRATEC has announced the delivery of the last two of four 8.38m diameter EPBMs that will be used by the FUTSU-OBAYASHI-CEC Joint Venture (FOC JV) for its underground works contract on the Taoyuan MRT Green Line Contract GC03, in Taoyuan city of Taiwan for the Department of Rapid Transit Systems.
The first two 6.24m diameter EPBMs completed their Factory Acceptance Tests (FATs) in 2021, with the remaining two 8.38m diameter EPBMs having just passed their Factory Acceptance Tests.
JIMT & TERRATEC are the sole provider of all seven new TBMs for the project. In 2021, a 6.24m diameter EPBM was delivered to BES-DAIHO-OKUMURA JV for its underground works contract on the Taoyuan MRT Green Line Contract GC02 with two other 6.24m diameter EPBMs have been produced in the JIMT facilities in Japan and passed their FATs also.
Of the seven TBMs, five were produced in the TERRATEC factory, with key components being delivered from Japan.
The Taoyuan MRT Green Line is a rapid transit line on the Taoyuan Metro which consists of six lines. The MRT Green Line has a total of 21 stations (10 underground and 11 stereoscopic stations), with a total length of 27.8km. Contract GC03 includes four underground stations and two drives of 2.6km long tunnels. For the main drive both TBMs will excavate from a launch shaft at Daxing West Road Intersection Station (G10) to Taoyuan Main Station (G07) through Minguang Road Station (G09) & Yong’he Market Station (G08). Tunnelling work will start in 2nd half of 2023.
The two versatile 8.38m EPBMs have cutterheads designed to work effectively in the geology which includes sandstone and boulders, with discharge of the large boulders through the ribbon-type screw conveyor.
Other features include VFD electric cutterhead drives, disc roller cutters and reinforced cutting tools for the gravel layer, high torque screw conveyors, active articulation systems and state-of-the-art guidance and control systems. As the TBMs progress, they will install 1,200mm wide by 350mm thick reinforced concrete lining rings, which consist of six segments plus a key. Muck cars will be used.
The Taoyuan MRT Green Line is scheduled for completion in 2026. The Taoyuan City government plans to connect the Taoyuan Airport Line, the MRT Green Line, the Green Line to Zhongli, the MRT Brown Line, the Sanying Extension Line, and the underground Taoyuan Railway to form a ring-shaped system. By connecting the six lines, the City MRT system will provide a fast and convenient service for the city’s urban redevelopment.