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| Completion of all bored tunnels within DTL2 |
At last, the final TBM (S602) has docked into Sixth Avenue Station, concluding 36 months of tunnelling works for the entire Downtown Line 2 when S548 was first launched at Beauty World on 8 June 2011. McConnell Dowell, which coordinated this final TBM docking at Sixth Avenue, is the same contractor which facilitated the inaugural TBM launching at Beauty World 3 years ago. CP1&2 has been excavated and supported, while the last cross passage 3 is currently being mined.
We'd like to acknowledge Herrenknecht, Kawasaki and Hitachi Zosen, the manufacturers for the 19 TBMs along Stage 2. Herrenknecht AG has a renowned history in producing the quality S-number TBMs of various sizes and uses since 1975. The local demand for their machines have steadily grown over the years since the successful implementation of S134 and S135 between Farrer Park and Boon Keng stations along the North East Line. A further 9 machines were procured to construct the southern half of the bored tunnels for the Circle Line. 22 machines had been ordered throughout DTL2 and DTL3, and more will come with the increasing demand of upcoming metro lines.
Kawasaki from Japan delivered 5 machines that were ordered under GS and SK for Contract 913 and 915. Most of their machines used in Singapore are of the slurry type, with a few currently involved in the SP cable tunnel project. Hitachi Zosen supplied STEC 4 Earth Pressure Balance Machines under C920.
These sophisticated machinery would not have been able to operate without the hundreds of men working beneath the surface under immense pressure and poor ventilation. A very big thank you to the tunnelling team from all nationality.
Below is a flashback of the earlier few TBM launches along the stage.
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| Inaugural launch at Beauty World |
C913
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| 1 of 2 Kawasaki Slurry TBMs procured for C913 |
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| Initial Launch for TBM1 (BP bound tunnel) towards BKP in August 2011 |
Breakthrough of TBM1 at Bukit Panjang
Breakthrough of TBM2 at Bukit Panjang
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| TBM2 gets pulled out into the retrieval shaft |
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| TBMs relaunch a second drive at Cashew towards Hillview |
Breakthrough of TBM2 at Hillview
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| Completed EP tunnel |
C915
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