Sunday, 25 October 2015

October Tunnel Progress

TEL1/2 Tunnel Chart, October 2015

Contract T206
Excavation of the Changi Bound tunnel by S-893 commenced at the LS2 last month. 15 rings have been erected as of October 12, and 54 rings built as of October 25 (9% completed, ~ 3 rings/day). At the present advance rate, the estimated breakthrough for S-893 is slated around June 2016.

S-894 will commence excavation on the Woodlands Bound tunnel soon.

The T206 project utilizes the steel fibre reinforced concrete (SFRC) segments, a special type of tunnel lining which uses less steel, however is more durable and crack resistant. The segments were previously trialed on the C933 Downtown Line project and the LTA has extended the use of these segments along a 10km stretch of tunnels under the T206 & T207 projects of the Thomson-East Coast Line. The SFRC lining consists of 7+1 segments instead of the usual 5+1. The tunnel lining segments for T206 are currently being supplied by Kimlun in Malaysia.


Progress of S-893 on the Changi Bound tunnel between LS2 to Woodlands (October 24)
Factory Acceptance at the Herrenknecht plant in January earlier this year (VMT China)
S-893 (Photo Cr: Khor Eng Leong, October 17)
Operator cabin (Photo Cr: Khor Eng Leong, October 17)
Loco (Photo Cr: Khor Eng Leong, October 17)


Contract T208
Excavation of the Changi Bound tunnel commenced by TBM2 earlier this month. 

Ring progress as of October 11
TBM C - Woodlands Bound Tunnel: Ring 57 (7% completed)
TBM A - Changi Bound Tunnel: Ring 33 (4% completed)

Ring progress as of November 2
TBM C - Woodlands Bound Tunnel: Ring 71 (9% completed)
TBM A - Changi Bound Tunnel: Ring 57 (7% completed)


TBM A (Luna) launched (Photo Cr: NFM)



Mount Pleasant - TBM Assembles



TEL3 Tunnel Chart, October 2015

The first NFM TBM for the T216 project has been delivered and is currently in the midst of assembly at the Mount Pleasant launch shaft. The first machine will be executing the drive on the Changi Bound tunnel.


October 17 (Photo Cr: Kenneth & Wei Chuen)
October 17 (Photo Cr: Kenneth & Wei Chuen)
October 17 (Photo Cr: Kenneth)
October 17 (Photo Cr: Garrison)
October 19 (Photo Cr: Garrison)
Lowering of Cutterhead (Photo Cr: Garrison, Oct 29)




NFM TBM - Factory Acceptance (IV)


Another slurry TBM that NFM is supplying for the Thomson-East Coast Line project has achieved the acceptance test with Daewoo last week.


October 23 (Photo Cr: David)
FAT October 24 (Photo Cr: NFM)




CREG PJM - Factory Acceptance


The acceptance test ceremony for the rectangular box jacking machine was held at the CREG Zhengzhou workshop on Wednesday. The first of its kind to be used in Singapore, the machine will drill a 7.6m x 5.6m 156m long subway for the T221 project beneath Havelock Road. Representatives from the client LTA, contractor Gammon and manufacturing partners from the China Railway Tunnel Group graced the official ceremony. The machine will be disassembled and transported to Singapore by year end.


Acceptance of the rectangular box  jacking machine, CREG (October 28)

Factory workers hailing the completion of the new machine

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