Gardens By The Bay - Tunnelling Completes

Tunnelling works for the T228 project have completed ahead of schedule, with the Hitachi Zosen EPBM breaking through the station d-wall from the return Changi bound tunnel drive earlier this month. RC works for the station's internal structure continues, with excavation works starting at entrance A. Preparations for the reinstatement of Marina Gardens Drive over the completed subway are in progress with implementation scheduled next quarter.

Gardens By The Bay station

Marina South Cast (IV)

RC works for the internal structure of the station continues up to the roof slab. The TBM has completed the Woodlands bound drive to Marina Bay and reassembly works for the Changi bound drive have begun with the dismantling of the backup gantries & assembly of the heavy lift crawler crane on site. The relaunch of the TBM is scheduled next quarter - the 2nd last to be facilitated along the TEL1-3.

Marina South station

Marina Bay Excavation (V)

Excavation works continue towards the formation level at the lower underplatform level. JGP works are taking place beneath the NSL and CCL tunnels, prior to the commencement of ground freezing and the subsequent SCL construction of the twin mainline stacked mined tunnels next quarter.

Marina Bay Station

Shenton Way Cast (IV)

Casting of the internal structure within the station is ongoing concurrent with the excavation and RC works at the unpaid linkway. Excavation works for TBM 1 has resumed with a further 100 rings advanced this quarter. In view of the lost time caused by the challenges at McCallum St, the project team is re-using TBM 2 to complete the Changi bound tunnel towards Maxwell. The TBM commenced mining works today, making it the 3rd last TBM relaunch along TEL1-3.

Shenton Way Station

Maxwell Excavation (II)

Excavation works are in progress beneath the completed concourse slab, down to the upper under-platform level.

Excavation works at Maxwell

Outram Park Cast (V)

Excavation works progresses along the linkways & casting works at the station.

Outram Park Station

Havelock Excavation (V)

Excavation works at the station have reached the formation level with the final S8 layer installed at the bottom of the station and RC works for the underplatform level will begin by the next quarter. RC works are in progress at entrances A & E.

Entrance E & D

Great World Cast (IV)

Reassembly of the 2 Herrenknecht machines took place this quarter, nearly a year after the initial 2 launches were carried out. EPBM S-945 commenced on its initial drive back to Orchard, while the mixshield has almost completed assembly works and would begin excavation works next month. RC works are in progress at the station and entrances, with pipe jacking works at the subway beneath Kim Seng Road set to commence next month.

Entrance B & subway link roof slab cast

Orchard Cast (V)

RC works are in progress at entrance B & bored pile works are in progress at entrance C.

Orchard Station

Orchard Boulevard Cast (IV)

RC works are in progress at the station's platform level.

Napier Excavation (IV)

Excavation works are nearly completed at the site. RC works have started at entrance A.

Napier Station

Stevens Diverts (IV)

The final and semi-permanent traffic diversion stage 5 has been implemented, which sees the worksite for the basement excavation and casting works situated in the center of both carriageway following the completion of the entire station roof slab. This layout is rarely preferred as it severely limits the working space and site movement of the construction activities, however necessary as the most optimal solution so as to not disrupt access from the residential apartments and side roads along both sides of the road.

Excavation works at the station to the concourse slab is in progress with the first section of the concourse slab cast. D-walling works are in progress at entrance B. The RTBM drive is almost completed and will reach the escalator shaft wall within the next few days.

Stevens station with TD5 implemented

Mount Pleasant Cast (IV)

RC works progresses at the station's concourse level. Structure around entrance B has surfaced to the basement roof level with formwork installation ongoing in preparation for the first roof slab cast.

Mount Pleasant Station

Caldecott Cast (VI)

The final concrete pour for the RC roof slab has taken place and the station is on track to achieve structural completion by the beginning of next year. Destrutting of the S1 and removal of king posts are taking place. Backfilling works are in progress at the cut and cover tunnel.

Caldecott Station

Upper Thomson Cast (II)

Excavation of the station has reached the formation level and casting of the underplatform/platform level are in progress. Excavation and RC works are simultaneously taking place across the entrances. TBM 1 has completed the second drive to Upper Thomson Station last month and dismantling works are in progress.

Completed concourse slab towards entrance D. Internal RC wall works for south TVF/VS/VE in progress.

Bright Hill Cast (II)

Excavation works have completed at the station, with casting works ongoing for the internal structure & entrances.

Bright Hill site

Mayflower - Basic Structure Completion

The Mayflower Station has achieved the Basic Structure Completion (BSC) earlier this quarter, making it the first station along the entire line to do so. The T210 team accomplished this around 3 months ahead of schedule, an extremely remarkable feat in the MRT construction where most projects struggle to even meet the dateline.

Filling and reinstatement works are progressing over the roof slab as the RC works for the entrance and service superstructure takes place. Numerous road realignments will begin to take place around the site for the phased removal of the temporary steel road decking as part of the permanent works.

Several site visits have been facilitated for the various stakeholders surrounding the station following the milestone (Photo: SNGS Primary)

Lentor - Tunnelling Completes

Bored tunnelling works for TBM 1 completed earlier this week, concluding the 18 months long Changi bound tunnel drive from Lentor to Mayflower station through the 5XO site. Its sister TBM 2 is 91% out of the 970-ring drive and targeted to complete by the end of the month. The tunnel roof structure of the 5XO is completed and backfilling works have commenced. Structural works for the station entrances are progressing on the surface level.

Lentor Station

Tagore - SWC Handover

The system wide contract (SWC) works have started with the partial site handover from T208. Backfilling works are in progress across the remaining 57m portion around the north launch shaft, together with the RC works for the Changi bound trackway portal structure.

Tagore Site handed over to SWCs between GL5-16

Springleaf - Basic Structure Completion

Casting of the station's roof slab has almost entirely completed and waterproofing works are in progress. RC works for the roof-ground level structure at the entrances and ventilation shafts have also taken place. The team has taken back possession of the launch shaft from T207 with structural works of the tunnel in progress. Backfilling works will commence from the next quarter onwards, and the realignment of Upper Thomson Road will take place after the hacking of the d-wall panels.

Completed roof slab at Springleaf Station

Facility Building Fit-Out

Architectural and M&E works are taking place within the completed structure of the RTS facility building. The completed 2 tunnels from SBAB have been handed over to T250, while FSC works are underway along the 2 tunnels from Springleaf. The launch shaft at Springleaf has also been handed back to T208 for the structural & subsequent backfilling works.

RTS Facility Building

Mainline Trackworks

Trackworks at the depot have been ongoing for over a year now, with majority of the works mostly completed across the depot. CTCI has begun taking over access along the completed portions of tunnel between T206-T208, with trackworks commencing along the reception tunnels 1&2 towards Sembawang Airbase. The permanent tunnel structure within the launch shafts are being constructed over as a conclusion to the civil works.

Mandai Depot

Woodlands South Cast (III)

Casting works for the station are now progressing along the internal RC partition and skinwall at the platform and concourse levels up to the roof structure.

Removal of S1 strut & basement roof - ground structure emerging at entrance A

Woodlands Cast (V)

The first section of the roof slab has been cast and reinforcement works for the second zone has almost been completed in preparations of the second pour. Casting works are ongoing at the entrances and crossover tunnel. 2 steel beam launching works for the NSL paid linkway was carried out over the last 2 months.

T203 Woodlands Station with roof slab completed around GL14-18

Woodlands North - Basic Structure Completion

The Woodlands North station is on track to achieve the Basic Structure Completion (BSC) by year end as scheduled, a milestone concluding the main civil & structural reinforced concrete works. The BSC also governs the necessary waterproofing, temporary lighting, drainage and general housekeeping to be in place for the safety of the system wide contractors (SWCs) to commence the architectural and M&E works.

Structural works are in progress for the 2 entrances as well as the north crossover tunnel. Backfilling works progress across the south crossover tunnel and launch shaft area. A second stage of earthworks have commenced by the authorities east to the T202 site in preparation of business, industrial and commercial developments around the station, including the upcoming JBRTS complex.

Completed structure of the Woodlands North station

November Tunnel Progress

Bored tunnelling works progresses across the line, with multiple TBM breakthroughs due around the new year of 2018. The Changi bound tunnel was completed at Orchard last month, completing all bored tunnel works under the T219 project - the first project to do so along TEL3.

TBMs with envisaged completion between Dec 2017 and Jan 2018:

T209 TBM 1&2

T212 TBM 1

T215 TBM S-936

T227 TBM 1

T228 TBM 1

TEL1/2 November Tunnel Progress (No change since Sep)

Gardens By The Bay Cast (III)

Casting of the station structure is progressing at the concourse level up to the basement roof slab.

T228 Gardens By The Bay Station

Marina South Cast (III)

Excavation works for the station zone adjacent to the cut and cover tunnel are progressing down to the formation level. The first completed portion at the center of the station sees the structure cast all the way up to the basement roof slab. Bored tunnelling works on the Woodlands bound drive is on its main drive with a third of the progress completed.

Marina Mall was diverted at the T228 interface at the end of Q3 for the cut and cover tunnel construction adjoining the Gardens By The Bay Station. Backfilling works across the completed portion of the C&C tunnel are underway.

Structure progressing at Marina South

Marina Bay Cast (IV)

Excavation and casting works have reached the lowest point of the station's structure at the platform level. Casting of the paid linkway roof and entrance substructures are ongoing.

T226 Marina Bay Station

Shenton Way Excavation (III)

Bored tunnelling works between Marina Bay and Shenton Way stations have completed with the second and final drive of TBM 2 docking at the upper platform of the station. FSC works have commenced for the lower tunnel. The porous geological conditions around the former shoreline beneath Shenton Way has created an ongoing challenge for TBM 1 since its launch in April, which has progressed little since its main drive conversion.

Bulk of the station's structure has reached the under-lower platform level, with a final zone of excavation works due for completion within a month. Excavation and shoring works have commenced at entrance C.

Completion of 144-bored pile linkway between the station, entrance C and Asia Square

Maxwell Cast (II)

The final portion of roof slab across the center zone of the station is being cast. Structure of the station has reached the concourse and upper platform levels at the south and north end respectively.

T223 Maxwell Station

Outram Park Excavation (III)

Excavation works across the network of new unpaid and paid linkway are progressing across the site. The project's second and final TBM relaunch took place at the end of Q3 for the Changi bound tunnel drive towards Havelock.

T222 Outram Park

Havelock Excavation (IV)

Excavation works are nearing the formation level beneath the S7 level and should complete by the end of the year. The excavation works for entrance D have also commenced, the last of the 5 entrances to be constructed.

Havelock Station fully strutted down to the formation level in preparations for the bottom-up construction

Great World Cast (III)

Excavation works have reached the formation level and the first zone of the station's underplatform level is being prepared for casting. Casting of the internal structure and external walls will proceed from here.

The first drives of both TBM S-945 & S-946 have completed and the replacement TBM shields have arrived at the site of both launch shafts in preparations for the relaunch.

T220 Great World station

Orchard Cast (IV)

The concourse and platform slabs of the station have been completed, and works on the lowest platform link level which will connect to the NSL station are in progress. Excavation works have completed at entrance B, and the roof structure of the cripple siding tunnel is mostly completed. Bored tunnel works from the 2nd drive are 75% completed with completion due next month, and the Stage 7 TD for the final stretch of underpass bored piling & excavation works to entrance C beneath Paterson Road is being prepared for implementation in the next quarter.

Orchard Station & Cripple Siding C&C tunnel site

Orchard Boulevard Excavation (III)

Excavations works have reached the formation level, with commencement of rebar installation at the underplatform level.

Orchard Boulevard Station

Napier Excavation (III)

The relaunch of TBM S-930 at the Napier launch shaft for the Changi bound tunnel drive towards Orchard Boulevard took place earlier this month on September 15. Excavation works are at the S6 layer at the deepest point and RC works for the station's underplatform structure should start by the end of the year.

T217 Napier Station (View towards Tanglin)

Stevens - RTBM Assembly

Assembly works are in progress for the second launch of the compressed-air Rectangular TBM along Whitley Road. The TBM has been reused following the successful completion of the subway structure at T221 Havelock last November. The 37-segment drive is scheduled to start next month and be completed by the end of the year, following which the TBM will be dismantled and proceed for a third run at the TELC6 T311 Bedok South project.

Diaphragm wall works for the station structure have finally completed and casting of the roof slab is ongoing along the final zone. Traffic Diversion 4 will be implemented at the station next month in preparation of the commencement of excavation works at the station.

Assembly of 65 tonne CRTG gantry crane for the RTBM works at SCGS

Mount Pleasant Cast (III)

The concourse slab is largely completed in the station structure and the final concrete pour at this level is ongoing. The S2 struts along the south side of the station has already been dismantled in preparations for the formwork installation for the RC roof slab casting.

Overnight casting works for the concourse slab at Mount Pleasant Station

Caldecott Cast (V)

Structure of the station is set to be completed by the end of the year as the station's roof slab gets cast concurrent with the strut dismantling works. Works will now focus on the backfilling and superstructure works on the new entrances, together with the A&A works at the Circle Line concourse and subsequent closure and conversion of the existing entrance A into an emergency escape staircase.

Caldecott Station

Upper Thomson Cast

Structure of the station is at varying progress with the basement roof and concourse slab cast at different zones. With the bored piling and ground improvement works completed, a total of 3 telescopic clamshell excavators are now facilitatating the excavation works for the top-down construction of the station. 

Upper Thomson Station

Contract Award - T200

SMRT Trains has been awarded the Thomson-East Coast Line (TEL) operator license after a 5-month closed tender evaluation. The TEL operator tender was called in February this year, with both existing local rail operators invited to participate. SMRT Trains offered a service fee of approximately S$1.7 billion for the 9-years service period between 2019 and 2028, with a possible extension to 2030 subjected to operational performance. 

600 staffs will be recruited over the next 2 years for the initial operations of TEL1.

Bright Hill Cast

Bored tunnelling works for the project were completed 2 weeks back with the docking of TBM 1 at the Upper Thomson Station, completing all 4 TBM drives under the scope of works. Preparations for the T211 tunnelling works extensively involved the challenging construction of 4 staggered launch shafts, 2 STPs, reconstruction of 2 POBs and ground improvement works beneath Block 258 at Ang Mo Kio.

Casting of the concourse slab is largely completed at the station box, with excavation works proceeding down to the platform level at certain zones. Casting of the Cross Island Line tunnels at the north end of the station box are progressing in tandem with the RC works at the concourse level. Backfilling works are underway over the completed north cut and cover tunnel structure.

Bright Hill Station

Mayflower Cast (V)

A realignment of Avenue 4 has been implemented for the RC construction of the 7th and final entrance B. The superstructure works for Entrance E & G are underway, and casting works for the closing of the station box are in progress to complete the station structure.

Realignment of Avenue 4

Lentor Cast (IV)

Excavation works for the station appears to have completed with structural works taking place at the platform level. Casting of the entrances are progressing, with the first superstructure emerging from Entrance D. Both TBMs are advancing through rock around Block 174 beneath AMK Avenue 4 and is targeted to breakthrough by December.

Lentor Station

Tagore Backfill (II)

The Tagore site has begun demobilization works by the T208 team as it prepares to handover the site to CTCI and other SWCs for the temporary staging area works between Tagore and Mount Pleasant. The STP and gantry cranes have been demobilized, with hardcore compacted above the station box. The FSC, cross passage and bracket installation works are ongoing for the twin tunnels towards Springleaf.

Tagore C&C site

Springleaf Cast (III)

Structure of the station box is largely completed with about 2/3 of the roof slab volume cast. BSC is scheduled by the end of the year.

Springleaf Station

Facility Building Cast (IV)

The T207 project is wrapping up with the completion of bored tunnelling works and the structural completion of the RTS Facility Building. The launch shaft at SBAB has been handed back to T206 following the completed FSC and installation of SWC brackets along the twin tunnels to the Facility Building.

RTS Facility Building

Sembawang Airbase Backfill

Backfilling works are underway at SBAB upon completion of the tunnel roof structure. As the installation of the SWC brackets in the tunnels complete by the next quarter, the interlinking tunnel structure within each launch shaft will be cast to provide a complete substructure tunnel linkage across TEL1 for trackworks to proceed on to the reception tracks and mainline from Mandai Depot.

S1-S2 removal with concurrent backfilling works at Sembawang Airbase C&C

Woodlands South Cast (II)

A final realignment of Woodlands Avenue 1 has been implemented for the excavation and construction of Entrance D, the last of the 4 entrances to be built. Structure of the station has reached the platform level, and the superstructure of Entrance A is emerging from ground level.

Woodlands South Station

Woodlands Cast (IV)

Casting of the station's concourse slab is largely completed and works are proceeding up to the roof level. Excavation works at the crossover tunnel site have completed facilitating the breakthrough of the T206 tunnels.

T203 Woodlands