J102 - Choa Chu Kang, Choa Chu Kang West, Forest Hill & Tengah update Q1 2024

 

18 March 2024 - An aerial view of the Choa Chu Kang station site.

18 March 2024 - An aerial view of the Choa Chu Kang West station.

18 March 2024 - Forest Hill / JS2A station at end Q1 2024.

18 March 2024 - A view of a partially obscured Tengah station, visible behind the launch gantry.
If you still have difficulty telling where the station is in the image, it is in front of the red and white
crane boom.

With Q1 of 2024 coming to a close soon, we're beginning our quarterly updates on the Jurong Region Line (JRL). Last week, we covered the progress of Tengah depot over the first quarter, including the commencement of trackworks! Today, we'll dive a little deeper into the works taking place under contract J102 by Shanghai Tunnel Engineering Co which includes 3 stations, approximately 4km of viaducts and a future shell station.

JS1 - Choa Chu Kang
Work at the station has progressed with the trackbeds for the JRL visible in the aerial views. Up close, casting works have progressed to the platform level. Works have also begun on casting of the new platform for the North-South Line (NSL)'s southbound track that will allow convenient cross-platform transfers to the JRL.

21 January 2024 - An aerial view of the station site in early-Q1.

15 February 2024 - An aerial view of the station site in mid-Q1.

18 March 2024 - An aerial view of the station site in late-Q1.

11 January 2024 - Work on the JRL station and new platform for the NSL at the southern end of
the station.

11 January 2024 - Casting was largely focused on the JRL sections at the beginning of Q1.

11 January 2024 - JRL trackbed casting underway.

21 January 2024 - A view of the JRL trackbeds' prorgress.

15 February 2024 - Side walls of the trackbeds for the JRL have been completed. The viaduct
railings are still in place on the NSL viaduct.

21 March 2024 - Completed sections of the JRL trackbed are visible.

21 March 2024 - A view of the work taking place at the northern end of the station.

21 March 2024 - Temporary barriers have been put up along the NSL viaduct as platform works
commence here.

21 March 2024 - The old viaduct railing has been dismantled to make way for the platform works.

Progress has also been made on the over run viaducts to the north of the station complex. Where previously a single viaduct pier had stood for the longest time, now stands a pair of viaduct piers. The second pier column was constructed and the column subsequently underwent the casting process. As of the end of Q1, the crosshead was still being cast.

26 January 2024 - Rebar works commencing for the second viaduct pier column.

26 January 2024 - The rebar installed for the pier column.

26 January 2024 - A view from across Choa Chu Kang Loop of the two viaduct piers.

15 February 2024 - Progress of the viaduct pier visible.

15 February 2024 - Rebar installation has progressed to the crown, with casting of the main pier
column completed.

18 March 2024 - The two columns north of the station complex visible at the end of the station.

The works also call for the modification of the existing NSL station. These works include the construction of a new set of stairs and escalators before the eventual dismantling and re-orientation of the upriding escalator at the station. These works can be seen from several of the openings between the concourse and platform levels of the station. Towards the end of the quarter, better views of the modification works at concourse level can be seen. The passenger service centre will be shifted from its current position and the farelines also moved to create a larger paid area within the station concourse. We will cover these changes in another, more detailed post, in time to come.

1 January 2024 - Hoarding at the platform level for a new staircase connecting to the new
transfer mezzanine level.

15 February 2024 - The new staircase connecting the mezzanine level to the platform level.

1 January 2024 - A view of the stairs connecting the concourse and transfer mezzanine levels.

1 January 2024 - A view of the new escalators installed that connect the concourse to the transfer
mezzanine level. This set of escalators will replace the existing set of escalators in phases.

12 October 2023 - A view of the station unpaid concourse area showing the hoarded off section.

18 March 2024 - Part of the hoarding has since come down, unveiling the new section of the
reconfigured station. The passenger service centre will be located here, where the former shop
unit used to be located.

18 March 2024 - A view of the station from the Lot 1 shopping mall front, showing the newly
reconfigured area open to view now.

Viaduct construction south of the station has also progressed, with launching of precast segmental box girders (SBGs) progressing parallel to the existing NSL viaduct. The contractor has used hanger beams to launch the first set of SBGs from the piers and will thereafter be using mobile cranes to launch the remaining segments.

11 January 2024 - A view of the construction of the viaduct with the first SBGs launched on the
first pier in this section in early Q1.

15 February 2024 - Progress of viaduct construction following the successful launch of the first
set of SBGs and bonding to the pier crosshead.

21 March 2024 - Progress of the works, with the hanger beam being removed from the second
pier crosshead following the successful launching of SBGs.

18 March 2024 - A view of the SBGs launched at the two piers.

21 March 2024 - The first pier now has 2 sets of SBGs launched on either side for each trackway.

JS2 - Choa Chu Kang West
Works at the second station of the project are progressing well, with work now fully focused on completing the concourse level. Following this, works will begin on the station columns that will work to support the platform level above.

21 January 2024 - An aerial view of the station's construction, with precast beams yet to be
fully installed in early-Q1.

24 February 2024 - The concourse level is closer to completion as of mid-Q1.

18 March 2024 - By end-Q1, the concourse level is largely completed with areas for the escalators
and lifts clearly marked out.

Works along the stretch of viaduct as the line turns onto Choa Chu Kang Avenue 3 will see the construction of 4 portal piers. By end-Q1, work had begun on the construction of the portal beams for 2 of the 4 piers. These portal piers will allow the JRL viaduct to navigate directly on top of the roadway while having sufficient support beneath to hold the viaduct in place.

21 January 2024 - One of the portal piers with the pair of columns already cast.

21 January 2024 - The second of four portal piers awaiting the casting of the portal beam.

21 January 2024 - A view westwards along Choa Chu Kang Avenue 3, with the third portal pier
visible.

15 February 2024 - The fourth portal pier columns are visible on either side of the dual
carriageway road.

15 February 2024 - A view of the remaining 3 portal piers, looking west.

24 February 2024 - Scaffolding going up around the pier columns of one of the portal piers.

24 February 2024 - The two remaining portal piers across Choa Chu Kang Way junction.

24 February 2024 - The third portal pier near block 281.

18 March 2024 - Work commencing on formwork for the portal beam construction.

18 March 2024 - A close up view of ongoing works to construct the portal beam.

18 March 2024 - Structural frames going in for another portal pier's beam construction.

JS2A - Forest Hill (name assigned by SGMC temporarily as the future station is currently unnamed)
The enigmatic station is one of the first to be connected to a mainline viaduct. Works have progressed eastwards from the future in-fill station and by the end of Q1, launch gantry Mulan had been relocated once again. This time, Mulan was working on the viaduct sections connecting this future station with Tengah station.

21 January 2024 - An aerial view of viaduct construction works west of Brickland Road.

21 January 2024 - A close up view of launch gantry Mulan, with the future in-fill station structure
visible to the gantry's left.

24 February 2024 - An aerial view of the construction site, showing launch gantry Mulan now
retreating further inwards to Tengah.

24 February 2024 - A close up view of the station and launch gantry.

24 February 2024 - Completed viaduct sections near the future station.

24 February 2024 - A view underneath shows the special viaduct pier at the station that allows
the trackway to transition from precast SBG viaduct to the trackbed integrated with the station
structure.

24 February 2024 - Another view showing the distinct station columns with stubs to support
the future island platform between the two tracks.

18 March 2024 - An aerial view of the construction site with launch gantry Mulan notably absent.

18 March 2024 - A close up view of the station.

JS3 - Tengah
Being located in a greenfield site, there is a lack of vantage points with good views of the station. Nonethless, the team tried and tried and managed to find a spot with a suitably good view of the station, although from quite a fair distance away. As of the end of Q1, works are progressing on the upper platform level of the station.

18 February 2024 - A view of the station's upper platform under construction in mid-Q1.

18 March 2024 - Another view of the station in the distance as at end-Q1.

4 March 2024 - Ultimately, it is simply easier to visit the JRL Project Information Centre to
receive an update on the progress of this station.

Work on the approach viaducts has also started to include parapet wall works. These are concrete segments which are attached to the side of the viaducts and provide space for electrical and signal cabling to be laid once trackworks begin. Over the quarter, a decent amount of the viaduct here has been equipped with the parapets. At certain locations along the line, these parapets will also house the noise barriers that will be installed.

18 February 2024 - A view of parapet wall installation works on the reception track and lower
deck viaducts.

18 March 2024 - Progress of the parapet wall installation works.

The approach tracks at Tengah Junction, where the east and west routes converge will see a non-revenue service track that connects from Tengah Plantation station to Hong Kah station. To facilitate the construction of this turnout, concrete casting to create a deck upon which the tracks can be laid is required. These works are currently underway as of end-Q1.

24 February 2024 - A view of the completed viaduct span under contract J102.

18 March 2024 - Preparatory works underway ahead of deck casting - the gap between the two rows
of viaduct spans will be decked over with concrete to allow trains to change from one track to
another when returning to the Tengah depot.

Decent progress is being made along this section of the line under contract J102. We look forward to more progress over the next quarter and will be sure to bring updates when they are available.

This post will be available on Instagram & Facebook on 28 March 2024.