Cross Island Line Construction: CRL - A snapshot in August 2024

An overview of 2 CRL1 contracts as of August 2024.
Top: Changi East depot
Bottom: Contract CR110 launch shaft at Paya Lebar Air Base

Overview of CRL1 stations CR3 - CR11 as of August 2024.
Top (L - R): CR3 - Loygang, CR4 - Pasir Ris East, CR5/CP1 - Pasir Ris
Middle (L - R): CR6 - Tampines North, CR7 - Defu, CR8 - Hougang
Bottom (L - R): CR9 - Serangoon North, CR10 – Tavistock, CR11 – Ang Mo Kio

Overview of CRL1 stations CR12 – CR13, CPE stations CP2 – CP4 & CRL2 stations CR15 –
CR18 as of August 2024.
Top (L - R): CR12 – Teck Ghee, CR13 – Bright Hill, CP2 – Elias
Middle (L - R): CP3 – Riviera, CP4 – Punggol, CR15 – King Albert Park
Bottom (L - R): CR16 – Maju, CR17 – Clementi, CR18 – West Coast

With the award of contract CR207 for tunnels between Maju and Clementi stations in August, all civil contracts across the Cross Island Line (CRL)'s phases 1, 2 and Punggol extension have been awarded. Work on phase 1 and the Punggol extension were well underway while works along phase 2 were at different stages owing to the contract award progress.

Phase 1
As the first phase of the line to be announced, work is several years into construction now. Earth retaining & stabilising system (ERSS) works have been underway and are partially completed at most stations. Tunneling work is also underway for contracts CR102, CR105 and CR109, which have since launched tunnel boring machines (TBM)s - underground mobile factories that excavate and construct tunnels simultaneously.

Changi East Depot (Contract CR101)
In a nutshell: Stabling yard columns were seen aplenty at the edge of the depot site. Elsewhere, casting of the base structure and base of the columns to support the roof were underway.

29 August 2024

CR3 - Loyang (Contract CR106)
In a nutshell: Diaphragm wall works were in full swing at the station site underneath Loyang Avenue.

29 August 2024

CR4 - Pasir Ris East (Contract CR107)
In a nutshell: Works continued on construction of the diaphragm walls and excavation of the launch shaft at the station's eastern end to be handed over to contract CR106. Slab casting for the ventilation shaft area was also underway.

29 August 2024

CR5 | CP1 - Pasir Ris (Contract CR108)
In a nutshell: Diaphragm wall works continued along the stretches of cut & cover tunnel. At the station box site, king posts were being installed. The length of the posts give an idea of the depth of the eventual station - the be the deepest in the country - once completed. Further west, a road diversion was carried out to allow for the remaining sections of diaphragm wall to be constructed next to Coco Palms condominium.

29 August 2024

CR6 - Tampines North (Contract CR109)
In a nutshell: Installation of struts had commenced at the cut & cover tunnel section near the southern launch shaft. Some excavation had begun in the area to facilitate construction of the crossover tunnel. Installation works continued in the direction of the station box.

At the northern launch shaft, a second gantry crane had been set up to support tunnel boring works. Both cranes were in use on the day of the visit.

29 August 2024

Large diameter bored tunnels – Paya Lebar Air Base (Contract CR110)
In a nutshell: At the launch shaft for the contract near the junction with Tampines Industrial Avenue 2 and Tampines Link, components of the tunnel boring machine (TBM) were still on the surface. Some of the covers had been removed.

29 August 2024

CR7 - Defu (Contract CR111)
In a nutshell: Work on the diaphragm walls continued to progress further east while excavation seemed to continue at the launch shaft at the station's western end. No gantry cranes or other supporting infrastructure for tunneling work was present with the exception of a temporary electrical substation.

31 August 2024

CR8 - Hougang (Contract CR112)
In a nutshell: At the station's northern end, the roof slab had been cast and backfilled over, leaving the construction openings for material excavation and lowering into the station box. With the road diversion implemented in the end of July, work commenced on the remaining sections of diaphragm walls.

31 August 2024

CR9 - Serangoon North (Contract CR113)
In a nutshell: Work on the diaphragm walls were in full swing along the northern boundary of the station. Site preparation for Exit 5 was also in progress with changes to the road layout and access to The Serangoon Community Club being implemented. At the site for Exit 4, soil improvement works continued before excavation works commence.

31 August 2024

CR10 - Tavistock (Contract CR115)
In a nutshell: Diaphragm wall construction works continued along the southern edge of the station. Once completed, the process would need to be repeated on the northern edge. Over at the launch shaft at Teck Ghee Park, the assembly of the first TBM was completed. Tunnel ring segments were also stacked near the launch shaft for easy lowering to the TBM.

31 August 2024

CR11 - Ang Mo Kio (Contract CR116)
In a nutshell: With works on the diaphragm wall along the southern edge of the station completed, king post installation was underway near the site of Exit 9. A shaft was visible at the site as well, underneath the existing North-South Line (NSL) viaduct. Next to the existing NSL station, diaphragm wall works resumed under the second phase of works.

Further east, at the site of Exit 10, excavation was underway ahead of the casting of the roof slab. Across the road, where Exit 11 would be located, the machinery constructing the diaphragm walls had since been removed from the site.

31 August 2024

CR12 – Teck Ghee (Contract N109A)
In a nutshell: Construction of the bored pile earth retaining & stabilising structure (ERSS) system was well underway. At the site of Exit 4, excavation was in progress for the receiving shaft of the rectangular TBM to be launched from Exit 3. Segments of the rectangular TBM were staged on site ahead of assembly.

30 August 2024

CR13 – Bright Hill (Contract CR117)
In a nutshell: Work was underway to prepare for a road diversion of Sin Ming Avenue near the launch shaft located at the eastern end of the station. Nearby, a desander unit was set up near the temporary electrical substation which would support the operations of the slurry TBM. Elsewhere throughout the site, work continued on the bored pile ERSS.

30 August 2024

9 August 2024
Source: LinkedIn

30 August 2024

Punggol Extension
The second section of the line to be announced and have contracts awarded saw ground breaking take place nearly a year ago now. Since then, all four sites under the section of line have had works commence in full swing.

CP2 – Elias (Contract P102)
In a nutshell: Diaphragm wall works had commenced at the launch shaft while preparation works for the diaphragm walls of the main station box were underway. A bus stop relocation was carried out along Pasir Ris Drive 3 to facilitate station exit works too.

29 August 2024

CP3 – Riviera (Contract P103)
In a nutshell: Another round of road diversion was carried out to allow for the construction of the guide walls ahead of diaphragm wall works for the main station box to commence. Soil improvement works were being carried out west of the station.

Over at the cripple siding site near Pasir Ris Camp, segments of the large diameter TBM were still on the surface as well. The segments of the machine were still covered up with the protective tarpaulins and there was also no heavy duty crane on site to assist with the lowering of the TBM into the launch shaft yet.

31 August 2024

29 August 2024

CP4 – Punggol (Contract P105)
In a nutshell: A road diversion had been carried out for the eastbound lanes of Punggol Central to facilitate works. Diaphragm wall works were being carried out at various sites along the contract. Within the existing North East Line station, sections of the former publicly accessible underpass were hoarded off for alteration works.

31 August 2024

Phase 2
The last phase, for the moment, that has been announced and had its contracts awarded has recently seen all civil contracts awarded. Several contracts were awarded nearly a year ago and hence have had more time to commence works and thus the various contracts are at differing stages of construction.

CR15 – King Albert Park (Contract CR205)
In a nutshell: Site preparation works are still underway with sections of the site still not cleared of vegetation. Soil investigation works were being carried out along with utility relocation works within the Methodist Girls' School. Several betonite silos were on site but had yet to be set up near the end of Blackmore Drive.

31 August 2024

CR16 – Maju (Contract CR206)
In a nutshell: Early works were in progress at the site, such as the construction of a pile presumably to conduct load testing works on at the northern end of the contract site. Towards the south, the project site offices were still being set up.

31 August 2024

CR17 – Clementi (Contract CR208)
In a nutshell: The former Clementi Neighbourhood Police Centre and Clementi Police Division Headquarters building had been demolished and work was centred on completing the demolition of the remaining basement section. A future CRL station exit will be located here. Work was in progress for the construction of a sheltered linkway to Clementi Avenue 5, through part of the site.

24 August 2024

CR18 – West Coast (Contract CR209)
In a nutshell: Demolition works had ramped up at the former Tanglin Secondary School site, with portions of the main buildings now showing signs of being torn down. Site offices were also being set up within the contract's boundaries towards the southern end.

24 August 2024

A similar but consolidated (a.k.a. simplified) post will be available on Instagram & Facebook on 7 September 2024.

1 comment:

sheikhaliSeptember 25, 2024 at 6:06 PM
Thanks for the detailed snapshot of CRL’s progress in August 2024! It’s impressive to see the continuous advancements and how the team is overcoming challenges to stay on track. These updates provide great transparency and insight into the construction process. Looking forward to seeing more milestones in the coming months

epicforcetech

Friday, September 6, 2024

CRL - A snapshot in August 2024

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