J103 - An update in Q1 2025

The two stations being constructed under contract J103 in end-Q1 2025.

Contract J103 is a critical contract in the construction of the Jurong Region Line (JRL), owing that this contract is responsible for the construction of the reception tracks that connect the depot to the mainline. Without this critical connection, trains from the depot will not be able to access the main line for testing or for revenue service. Works through the past quarter have seen some milestones being achieved - namely the semi-completion of the main line viaduct span across the Pan Island Expressway (PIE), the commencement of escalator installation at both stations under the contract as well as interior fit out works taking place. We'll go through these developments in greater detail after the jump.

JS4 - Hong Kah
Major highlights of progress in Q1 at the station include the installation of escalators connecting the concourse & platform levels and the completion of the linkbridge connecting to the exit across Tengah Garden Avenue from the station building.

23 March 2025 - An overview of Hong Kah station at the end of Q1 2025.

25 January 2025 - An overview of Hong Kah station at the beginning of Q1 2025.

Escalator installation
Installation of the 3 escalators connecting the concourse and platform levels of the station have begun this past quarter. Early on, in the beginning of the quarter no escalators were seen to be installed. However, by the close of the quarter, it was possible to make out at least 2 sets installed at the northern end of the station, flanking the centrally located staircase. The escalators here were covered in grey tarpaulin, instead of the yellow seen under contract J102's station sites.

25 January 2025 - A view of the southern section of the concourse level of the station.

25 January 2025 - A view of the northern section of the concourse level of the station.

23 March 2025 - The southern end of the concourse level appears unchanged.

23 March 2025 - Escalators covered in grey tarpaulin seen at the northern end of the concourse
level.

Linkbridge construction
Another mark of the progress made has been the completion of the linkbridge connecting the station with an exit located across Tengah Garden Avenue. Through the quarter, casting works were conducted and completed, with roofing works commencing.

25 January 2025 - Falsework in place for the casting of the linkbridge to an exit located across
Tengah Garden Avenue from the station.

25 January 2025

25 January 2025 - Work underway for the casting of the linkbridge connecting to the exit.

25 January 2025 - Part of the exit podium structure completed and roof frame installation works
underway.

8 March 2025 - A view of the under construction extension of Tengah Garden Avenue up to
the junction with Tengah Central. The station lies beyond.

8 March 2025 - A view of the completed linkbridge, exit podium and roof frame under installation.

Viaducts between Hong Kah & Corporation stations and Tengah depot
Much work still remains along this critical section of viaduct that links the depot with the main line and connects the Choa Chu Kang/Tengah side of the line to the side serving Jurong. Over the past quarter, the most significant development can be seen along the western reception tracks where the viaduct piers have finally taken shape to allow segment launching works to begin.

8 March 2025 - An aerial view of the eastern reception tracks & main line viaducts as of end
Q1 2025.

25 January 2025 - An aerial view of the eastern reception track & main line viaducts as of early
Q1 2025.

Over at the main line viaduct, part of the crossing over the Pan Island Expressway (PIE) has been semi-completed, with one segment remaining to be launched to complete the span over the westbound carriageway. The span across the eastbound carriageway was half completed, with the remaining half connecting to a movement & expansion joint pier, requiring more complicated launching methods.

25 January 2025 - An aerial view of the viaduct piers for the eastern reception tracks under
construction as viaduct segment launching works begin on the main line parallel to the PIE &
canal.

25 January 2025 - Crosshead construction underway for the viaduct piers of the eastern
reception tracks.

Finally, the eastern reception tracks have completed all spans across the PIE. However, the viaduct spans along Jurong West Avenue 2 still requires plenty of work as gaps still remain in this section leading up to the connection with the main line spans to the east of Corporation station.

25 January 2025 - The completed spans of the western reception tracks in view, with the
eastern reception tracks and main line paling in comparison.

25 January 2025 - Completed viaduct spans of the western reception tracks across the PIE.

25 January 2025 - The extent of the completed viaduct spans of the western reception tracks.

25 January 2025 - Ongoing viaduct span construction works towards Corporation station.

13 March 2025 - The almost completed main line viaduct span across the PIE.

13 March 2025 - The span is one segment away from completion as it crosses the westbound
carriageway of the PIE. On the right, viaduct segment launching works were beginning
for the eastern reception track viaduct spans.

13 March 2025 - The main line viaduct spans on the left under construction, with the completed
viaduct spans of the western reception tracks seen in the background.

13 March 2025

13 March 2025 - Semi-completed sections of the main line viaduct closer to Corporation station.

13 March 2025 - Viaduct segmental box girders were still being launched for the western
reception track viaduct along Jurong West Avenue 2.

13 March 2025 - Significant gaps still remain in the viaduct spans to be completed.

13 March 2025

JS5 - Corporation
Progress at Corporation station over the past quarter has seen the works at the two station exit podiums continue while escalator installation works have commenced. Cladding works on the station's roof have also commenced along with the installation of cladding on the station platforms' utility services booms, from which services such as passenger information displays, public address speakers and lighting will be hung. Viaduct beam construction towards the contract boundary was largely completed, with works focused on the launching on viaduct segmental box girders near movement & expansion joint piers.

13 March 2025 - An aerial view of the station building in end-Q1 2025. Painting of the station
building's facade can be seen underway, along with the installation of cladding along the edge of
the station roof.

25 January 2025 - An aerial view of the station in early-Q1 2025. The station building still sports
bare concrete for most part.

Construction of exit podium
Two exit podiums will be built as part of the station's initial construction, serving 3 exits. A fourth exit was initially planned but has been deferred for the time being. Work on the exit podium on the southern side of the station is fairly advanced, with the structure receiving its roof frame. The structure for the stairs, lift and escalators have all been cast. The next expected step will be to have the escalators installed.

Over on the station's northern side, a second podium that would eventually connect to the mobility corridor within the Jurong Innovation District was also being constructed. This podium would serve 2 exits on either side and feature lift, stair and escalator access. While the linkbridge over Jurong West Avenue 2 had been constructed prior, the works for the podium could only begin in earnest following the realignment of the westbound carriageway to the south side of the station, allowing the eastbound carriageway to revert to its original position as well. Work on the exit podium was progressing, with the concourse level slab of the podium taking shape through the past quarter.

25 January 2025 - An aerial view of the station exit's linkbridge and podium in early-Q1 2025.

25 January 2025 - A close up view of the linkbridge with roofing works underway.

25 January 2025 - Roofing works had also commenced at the station's exit podium.

13 March 2025 - A close up view of the exit's linkbridge & podium in end-Q1 2025.

13 March 2025 - A view of the exit podium in end-Q1 2025. The concrete side walls for the
escalators have been completed.

13 March 2025 - A view of the linkbridge connecting to the podium, with the lift shaft and
staircase visible. The underside of the roof is visible as well.

25 January 2025 - Exit podium and linkbridge construction on the northern side of the station
underway in early-Q1 2025.

25 January 2025 - A view of the exit podium and linkbridge construction from street level in
early-Q1.

16 March 2025 - A view of the exit podium on the northern side of the station. Formwork can be
seen in place for casting works.

16 March 2025 - Another view showing the extent of the formwork put in place for the exit podium
structure casting.

Station interior fit out
Various works have been ongoing within the station's interior, including but not limited to electrical component installation, trial assembly of the station's side wall panels, utility services boom installation and escalator installation works. Part of the utility services boom was also noted to have begun cladding works, following the installation of cable ducting and public address system speakers within.

25 January 2025 - A view of the station from the northern edge at street level. The trial installation
of the station's side wall panels can be seen.

25 January 2025 - A view of the station's utility services boom already installed at platform level.
The utility boom can be seen as a metal cage with orange cable ducting within.

25 January 2025 - A view of the concourse level with side wall panel and escalator frame visible.

25 January 2025 - Escalator frame components visible within the station concourse under the
yellow tarpaulin.

16 March 2025 - A view of the staircase leading to the platform at the station's eastern end.

16 March 2025 - Through the station concourse, a view of the decking for the exit podium structure
can be seen as well.

16 March 2025 - A view of the staircase at the station's western end.

16 March 2025 - Installation works in progress for the escalator at this end of the station.

16 March 2025 - Creation of equipment cabinet space below the staircase.

16 March 2025 - Another view of escalator components in the station's concourse level.

16 March 2025 - The trial assembly of the station's side wall panels visible behind the staircase.

16 March 2025 - Cladding works for the utility boom were underway, with speakers already
installed along the length of the fixture.

Viaduct beam assembly progress
The boundary line for contract J103's scope of works extends along the viaduct towards Jurong West station, ending just before the junction of Jurong West Avenue 2 with Jurong West Street 23. Works along the viaduct have steadily progressed with approximately 2 to 3 sections near movement & expansion joint piers remaining to be completed. These employ the use of the trestle method for segment launching, hence require more time as the trestle structure needs to be assembled and checked for stability before launching works can proceed.

25 January 2025 - A view of the viaduct beams under construction from Corporation station to
the contract boundary just before the Jurong West Street 23 junction.

25 January 2025 - A view of the remaining sections of viaduct to be completed as of early-Q1.

13 March 2025 - A view of the remaining sections of viaduct to be completed as of end-Q1.

13 March 2025 - The interface pier at the contract boundary point. Tensioning works were ongoing
to complete the viaduct beam span before the pier is handed back to contract J105 for their
connection works.

13 March 2025 - Trestle assembly works ahead of segment launching works to close the gap
in a section of viaduct near the Corporation station, just before the junction with Corporation Road.

While there has definitely been progress made through the past quarter, significant gaps still remain in the line's viaduct within this contract. Most notably, although the western reception tracks have successfully completed spans across the PIE, the interface point between the viaducts for these tracks and the main line tracks has not been completed yet. Without an interface point, trackworks will not be able to proceed and trains will not be able to access the main line for systems testing works.

The good news is that there is still time for these works to be completed as the trains have yet to arrive, although they are expected to reach local shores some time this year. It is also heartening to see the progress made on the station buildings at both locations, with the exit podium structures coming up quickly. We wish contract J103 a safe & timely completion of the remaining works.

This post will also be available on Instagram & Facebook on 11 April 2025.