Saturday 31 December 2016

Gardens By The Bay Cast

Casting of the base slab is progressing at the station box. The base slab is completed at Entrance C, and excavation of the adjacent subway has started. Initial drive of the TBM is presumably completed.

Gardens By The Bay Station

Friday 30 December 2016

Marina South Cast

Excavation works for the station are nearing completion and falsework is visible at the center zone for the subsequent casting of the concourse level, while rebar installation for the cut and cover tunnel base slab is being done. Launching of the TBM is hindered most likely by the surface ground improvement works, making this the last project to commence any bored tunnel works.

Excavation works at the concourse level at GL10-15

Thursday 29 December 2016

Marina Bay Cast (II)

Bulk excavation works for the NSL and CCL linkways are underway. The transfer level (B3) has been cast at the station and excavation works are progressing to the upper platform level.

Excavation of Circle Line linkway

Wednesday 28 December 2016

Shenton Way Excavation

Excavation works are in full swing at the station box, with varying progress between the concourse and plantroom level (B2/B3). Excavation of LS3 is still in progress, and LS4 is being handed back to Taisei for the upper tunnel slab casting works.

Installation of gantry cranes for top-down construction of the station

Tuesday 27 December 2016

Maxwell D-walls (VIII)

A minor realignment of the Neil Road intersection took place earlier this month for the final few d-wall panel construction. RC works presumably for the concourse slab is being done at the north wall.

Maxwell Station

Monday 26 December 2016

Outram Park Excavation

Excavation and casting works are progressing at the station box.

T222 Outram Park

Havelock Excavation

Bulk excavation works for the Havelock station have finally started and should continue till the second half of 2017 for the bottom up construction of the station. Tunnelling works for the rectangular box jacking machine completed in mid November, and dismantling of the machine is in progress.

Commencement of excavation works for the station box

Thursday 22 December 2016

Great World Cast (II)

Preparations for the heavy lifting works for the lowering of the project's first Herrenknecht TBM is underway now with the arrival of the 1200t Demag mobile crane. Lowering of the TBM will be completed by Christmas and tunnelling works for the Woodlands bound drive to Orchard station should commence around the later part of 1Q17. Excavation works for the station have reached the first basement (roof) level and casting works are underway.

Unveiling of EPBM S-945 and delivery of counterweights for heavy lifting mobilization

Orchard Excavation

Excavation and casting work continues at the Orchard site.

Bulk excavation works in full swing at the cut and cover tunnel

Orchard Boulevard Cast (II)

Subsurface casting works for the Upper Concourse level is taking place at the Orchard Boulevard station.

Casting works at Orchard Boulevard

Tuesday 20 December 2016

Piling at Napier (VII)

The final stage of piling works are scheduled to complete by the end of the year. The Herrenknecht TBM has remarkably driven the 750m long mixed-ground tunnel within just 3 months from the transition to its main drive, averaging close to 6 rings a day with interventions. The TBM is slated to reach the T218 boundary by the end of the week. Excavation works at the south side of the station box are in progress.

Napier Station

Monday 19 December 2016

Stevens Diverts (III)

The next phase of traffic diversion at the station will be implemented along the southbound carriageway by the end of the month for the next phase of the diaphragm wall construction. The diaphragm wall works for entrance C/D and the escalator shaft have completed and started respectively.

Roof slab completed over the center zone for the upcoming Stage 3A traffic diversion

Sunday 18 December 2016

Mount Pleasant Excavation (IV)

Excavation works are completed at the Mount Pleasant station and RC works have commenced at the base.

Demobilization of telescopic clamshell excavators marking the end of the station box excavation

Saturday 17 December 2016

Caldecott Cast (II)

Casting works for the project continues.

Platform, tunnel walls and trackbed completed (September)

Friday 16 December 2016

Upper Thomson D-walls (IV)

The last phase of the d-wall works, together with piling works for Entrance D, have finally commenced with the full implementation of the 3rd traffic diversion scheme. Excavation works should commence by the middle of 2017.

D-wall grab mobilized back on site for the panel excavation

Thursday 15 December 2016

Piling at Bright Hill (VII)

Bored pile works at the south side of the station are completing as tunnelling works for all 4 TBMs are underway.

Realignment of westbound carriageway over the completed pile zones

Wednesday 14 December 2016

Mayflower Cast (II)

Casting works for the station have reached the platform level where all excavation works have completed. The project is currently one of the quickest along the line, with the station and entrances seemingly on track to achieve basic structural completion next year - ahead of the indicative 2018 target.

Basement roof slab completed at Entrance D

Tuesday 13 December 2016

Monday 12 December 2016

Tagore Cast (IV)

Casting of the concourse and platform structures are ongoing at Tagore.

TBM B Progress - R504 (706m, 64% completed)
TBM C2 Progress - R367 (514m, 47% completed)

Tagore C&C tunnel

Sunday 11 December 2016

Springleaf Excavation (IV)

Excavation works are ongoing at nearing completion at the station box.

Springleaf Station

Saturday 10 December 2016

Facility Building Backfill

Superstructures for the escape shafts are coming up as the TBM main drives are underway. TBM 1 and 2 are now beneath the Seletar Expressway bounded for the RTS Facility Building,  The first breakthrough of TBM 3 and 4 are expected by the next quarter.

Dismantled gantry crane, backfilling and RC works for the facility building

Friday 9 December 2016

Mandai Depot - Trackwork Begins

Commencement of the line's largest system-wide contract, led by CTCI for the design, supply, construction, testing and commissioning of trackwork and third rail system, took place this quarter with the staging ground prepared at the Mandai Depot. This is the second back-to-back trackwork project awarded to the Taiwanese contractor, with a smooth transition of resources expected from the recently completed Downtown Line 3.

Structure for the stabling yard, bus parking deck and perimeter wall mostly completed

Wednesday 7 December 2016

Woodlands South Excavation (III)

All diaphragm wall works have been completed for the project. The final section of roof slab will be constructed at the station before joining the existing bulk excavation works at the north end.

Strut installation for roof slab construction

Woodlands Cast

Bored pile works for the cut and cover tunnel have completed, and the final zone will commence strutting and excavation works. Casting of the skin wall and platform is ongoing at the station.

Shoring works at the south half of the crossover tunnel

Woodlands North Cast (II)

Casting work continues at the Woodlands North site. All ground improvement works have been cleared at the north crossover tunnel site and casting works are commencing there. To the south, casting works for the south crossover tunnel roof and walls are nearly completed. The underplatform level of the station box has been completed.

Casting ongoing at the south crossover tunnel

Saturday 5 November 2016

November Tunnel Progress

Tunnelling works for the line have been ongoing for 15 months now. 11 bored tunnels have been completed.

TEL1/2 Tunnel Chart, November 2016
T202 - Breakthrough of TBM 2 at Woodlands Station on October 10. This is the first contract to complete all bored tunnel excavation

Friday 14 October 2016

Gardens By The Bay - TBM Assembly

The Hitachi Zosen EPBM was lowered down the launch shaft in August and assembly works are underway beneath the road deck. Excavation works are mostly completed along the station box, and RC works have commenced for the base slab at the southern end.

T228 Gardens By The Bay station

Thursday 13 October 2016

Marina South Excavation (IV)

Excavation works are nearly completed at the S5-S6 layer across the 20m deep station box and cut and cover tunnel.

Excavation works across the Marina South site

Wednesday 12 October 2016

Marina Bay Excavation (III)

Excavation works are presumed to have passed the mezzanine level and nearing the transfer level (B3).

Excavation of the Circle Line paid and unpaid linkway (bottom left)

Tuesday 11 October 2016

Shenton Way Cast (II)

The first zone of roof slab has been completed and casting of zone 2 is in progress. Excavation works for the 3rd zone are underway. 2 gantry cranes have been assembled at LS3.

Roof slab casting works

Monday 10 October 2016

Maxwell D-walls (VII)

The extensive Diaphragm wall and Barrett pile works, which have been ongoing for over 2 years, is entering its final quarter and will be completed by year end at the Maxwell station. Meanwhile, excavation works at Entrance A are progressing to the concourse level beneath the completed roof slab at the southern zone.

Thursday 6 October 2016

Upper Thomson - TBM 3 Assembly

The third TBM for the T212 project was lowered down the Upper Thomson Launch Shaft today following shipment delays. This is the 34th TBM to be lowered for the entire Thomson Line project (C1-C4), and also the last single-drive TBM to be launched. The JTSC Slurry TBM will undergo assembly works within the launch shaft and commence excavation on the 1.36km Woodlands Bound tunnel from the ULS towards Caldecott station by year end.

Collaborating with the tunnel team, the lowering process was captured over a span of 30 hours.

TEL 1/2 Tunnel Chart, September 2016
Tandem lifting of tail shield

Tuesday 4 October 2016

Outram Park Cast (III)

Completion of the last zone of roof slab took place concurrent with the demobilization of the D-wall grabs and ancillary silo & slurry equipment in August. Bulk excavation works are now underway at the Outram Park station.

Bulk excavation works across the Outram Park station

Sunday 2 October 2016

Piling at Havelock (VI)

SBP works continue at Havelock station. Tunnelling works for the rectangular TBM which were envisaged by the project team to have been completed now, are only midway through with 61 segments jacked thus far.

Preparations for the installation of R61 at the Havelock launch shaft

Friday 30 September 2016

Great World Cast

Construction of the roof slab is taking place and is midway completed at the Great World station. Excavation works have commenced at the north end of the station, as well as the subway to River Valley road.

T220 Great World site

Thursday 29 September 2016

Orchard Cast (II)

D-walling works for the project have been fully completed at the cut and cover tunnel ahead of schedule and excavation works have commenced there. Basement casting of the concourse slab is taking place at the station box. A major traffic realignment is being prepared at the Orchard/Paterson intersection for the underpass works.

Completed roof slab at Orchard station

Tuesday 27 September 2016

Orchard Boulevard Excavation

Top-down construction of the Orchard Boulevard Station have commenced with excavation works reaching the roof slab. Concreting works will take place in the next quarter.

Excavation to the reduced level of the roof slab

Monday 26 September 2016

Caldecott Cast

Casting works are in progress at the station. Mining of the southbound tunnel at the cripple siding is completed.

Caldecott site illuminated in the west precinct of Toa Payoh

Tuesday 20 September 2016

Piling at Napier (VI)

Piling works continue at the station box and is set to complete by year end upon 2 more traffic realignments along Cluny Road. Excavation works have just commenced at the south entrance. TBM S-930 has transitioned to its main drive and will continue advancement to the Orchard Boulevard Station.

Telescopic excavator deployed for the excavation of the south entrance

Monday 19 September 2016

Stevens D-walls (IV)

D-walling works progresses at the Stevens station. TBM 1 and TBM 2 have completed initial drive works and are transitioning to the main drive, while TBM 3 has just started tunnel excavation works.

T216 Stevens Station site

Saturday 17 September 2016

Mount Pleasant Excavation (III)

Excavation works are progressing through the S5-S6 layer and should wrap up by year end. TBM S-936 is in the midst of transitioning to its main drive.

T215 Mount Pleasant Station

Thursday 15 September 2016

Upper Thomson - Canal Diversion

The canal running parallel to the station has been diverted and demolishment of the canal is taking place along the diverted stretch of the northbound carriageway. The 3rd traffic diversion will be fully implemented upon the completion of bored pile works at the center of the station box, following which the demolishment and backfilling of the remaining stretch of canal, together with the crucial diaphragm wall works would take place.

A heavy-duty crane is currently being assembled at the Upper Thomson Launch Shaft, awaiting the arrival and subsequent lowering of TBM 3 next Friday. TBM 1 has completed its initial drive and is transitioning to its main drive. TBM 2 is on its initial drive to Caldecott.

Completion of canal diversion and demolishment of former canal in progress

Tuesday 13 September 2016

Bright Hill - POB launch

The 2 replacement POBs for the project were launched at Ang Mo Kio Avenue 3 and Upper Thomson Road in August and September respectively. The new bridges are simply spanned with staircases re-positioned to avoid the tunnel alignments leading up to the Bright Hill station. TBM 2 is progressing on its initial drive to Upper Thomson and the other 3 TBMs are being assembled up in the launch shafts. 

Another realignment of Sin Ming Avenue took place earlier this quarter to facilitate the final stretch of secant bored pile works south of the station box. Excavation and basement RC works have commenced at entrance B.

Realignment of Sin Ming Avenue (west bound carriageway) for final stretch of SBP works

Monday 12 September 2016

Mayflower Cast

Casting of the concourse slab at the Mayflower station started in the previous quarter and and is largely completed at the subways and entrances. Excavation works are at the mezzanine level now.

T210 Mayflower Station

Sunday 11 September 2016

Lentor Excavation (III)

The remaining diaphragm wall panels have been completed at the Lentor station and excavation for the basement roof slab for the second stage of zone 2, and zone 3 are in progress and will be cast by the 4th quarter. Bulk excavation works are progressing at zone 1.

TBM 1 has completed conversion to its main drive and is now under the intersection of Avenue 9. TBM 2 was just launched last month and is on it's initial drive to 5XO.

Excavation for the RC construction of the basement roof slab

Saturday 10 September 2016

Tagore Cast (III)

TBM C was relaunched in July. The removal of the temporary rings and reaction frame at the lauch shaft last month completes the TBM's conversion to its main drive. TBM B is now halfway through its tunnel drive to Springleaf and under the Seletar Expressway. The concourse slab at Tagore has been cast.

TBM B and TBM C2 progress as of September 8

Thursday 8 September 2016

Wednesday 7 September 2016

Facility Building Cast (II)

The RTS facility building is progressively being constructed upwards. Main drives are underway across all 4 TBMs.

TBM 3 and TBM 4 progress from Sembawang Airbase to RTS Facility Building
TBM 1 and TBM 2 progress from Springleaf Station to RTS Facility Building
RTS Facility Building