Sunday, 25 January 2015

Prison Shaft

3 tunnels remain under C926, which ought to had completed prior to the end of 2014. There have been several complications within the project, with poor project management as one of the contributing factors to the lagging progress. We have a final look at the Prison Shaft where the shield segments of the Bukit Panjang bound TBM has yet to be lowered down. This very machine will be at the face of the breakthrough ceremony at Tampines West to mark the completion of tunnelling works for the Downtown Line in about 4 to 5 months time. 

As of now, only its sister Expo machine has been lowered and in the process of assembling, with the main drive commencing next month. The BP machine should follow suit in March.

Close look of the shield of the BP TBM sitting beneath the gantry crane
Route of the 4 tunnel drives from the Prison Shaft. The highlighted section leftwards to Bedok Reservoir represents the completed bored tunnels, which ends abruptly in the middle after the team stopped updating sometime back in October

Yard of precast tunnel segments

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