J109 - Toh Guan, Jurong Town Hall & Pandan Reservoir update Q1 2024

 

18 March 2024 - An aerial view of Toh Guan station at the end of Q1. The first station pier
crosshead formwork for the concourse level slab can be seen.

18 March 2024 - An aerial view of the Jurong Town Hall station at the end of Q1.

18 March 2024 - An aerial view of Pandan Reservoir station at the end of Q1.

Contract J106 entails the construction of Toh Guan, Jurong Town Hall and Pandan Reservoir stations. Over the past quarter, the most changes can be seen over at Toh Guan station with the formwork for the first station pier's concourse level crosshead can be seen. At Jurong Town Hall however, things were a little slower with casting work continuing over at the concourse level slab. Pandan Reservoir station saw similar progress, with work still mostly focused on the street level foundations and underfloor cable troughs. We'll dive deeper into the works at the various sites under the contract.

JE4 - Toh Guan
Toh Guan station is sited between the existing North-South Line (NSL) tracks on approach to Jurong East station and existing HDB apartment blocks. Directly below the future station is Jurong East Central, with barely sufficient room to fit in station exits on either side of the road. The contractors though, have made the site work in the initial stages of construction for the station's foundations. Gradually over the past quarter, the station's piers have began to take shape with the columns becoming more prominent. Entering the next stage of construction called for the installation of formwork for the casting of the concourse level crossheads that will support the slab above, allowing passengers to access the platform. Thus this past quarter has also seen the commencement of road closures to facilitate the delivery and installation of the 26-metre long forms that will enable the team to begin casting works in Q2.

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

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

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

18 March 2024 - A close up view of the formwork for the first station pier's concourse level
crosshead. Rebar had yet to be installed within ahead of casting work.

Work on the viaduct approach to the north of the station have seen the completion of foundation works for the pier columns. With the pile caps cast, the sheet piles were removed from the excavation sites over the past quarter and backfilling works began. The next stage of construction will see work on the pier columns commence to produce a line of piers along Jurong East Central. Just before the viaduct veers off to the west, a portal pier will be constructed straddling the northbound carriageway to enable the line to swing out over the Pan Island Expressway (PIE).

26 January 2024 - A view northwards of the approach viaduct site to Toh Guan station in early-Q1.

24 February 2024 - An aerial view of the station approach viaducts in mid-Q1.

18 March 2024 - An aerial view of the station approach viaducts at end-Q1.

The crossing over the PIE requires longer spans without support in between, calling for the construction of a special span. Larger viaduct piers are being constructed in the PIE median and on the embankment, just next to the flyover connecting Jurong East to Bukit Batok. Over the past quarter, the pier in the median of the expressway has been growing gradually, whereas the pier on the embankment has seemed to stagnate.

26 January 2024 - Viaduct piers for the PIE special crossing taking shape in early-Q1.

24 February 2024 - Viaduct piers for the special PIE crossing in mid-Q1.

24 February 2024 - The stub of a pier for the PIE special crossing near Jurong East Central in
mid-Q1.

18 March 2024 - One of the movement expansion joint piers on the Bukit Batok side of the
PIE crossing in end-Q1.

18 March 2024 - The viaduct pier in the median of the PIE taking shape in end-Q1.

18 March 2024 - The stub of the viaduct pier on the Jurong East side of the PIE in end-Q1, without
much change from the previous month.

Across the expressway, viaduct segment launching has commenced. Interestingly, a double celled single box girder is used for the construction of the viaduct here. Elsewhere along the Jurong Region Line (JRL), single celled box girders are used for each trackway. A double celled box girder means that two tracks can be supported on a single segment, without any gaps in between the trackways that is present with single celled box girders. The lifting mechanism is therefore larger to cater for the larger load of a single box girder. Construction to complete the crossheads of other viaduct piers in the vicinity also continued through the quarter.

26 January 2024 - Viaduct segment launching along the Bukit Batok side of the PIE. One of the
pier crossheads has yet to be completed.

26 January 2024 - A view of the double cell segment box with the lifting mechanism.

24 February 2024 - A view of pier crossheads under construction with segment launching in the
background.

24 February 2024 - A view of the completed section of launched segments.

18 March 2024 - Progress of the viaduct segment launching as at end-Q1.

The viaducts south of the Toh Guan station continue along Jurong East Central up to the contract boundary with contract J120 for the Jurong East Integrated Transport Hub & associated viaducts. Works here were less advanced compared to those north of the Toh Guan station, with foundation works taking place along the stretch through the past quarter.

26 January 2024 - An aerial view of the viaduct section south of Toh Guan station in early-Q1.

24 February 2024 - The viaduct site towards Jurong East in mid-Q1.

24 February 2024 - Construction works near the contract boundary with contract J120. A trench
for foundation works for the viaduct pier between the EWL viaducts can be seen.

18 March 2024 - The viaduct site near contract J120 in end-Q1.

18 March 2024 - Foundation works for the viaduct piers in the median of Jurong East Central.

18 March 2024

JE6 - Jurong Town Hall
The next station in the contract is Jurong Town Hall further south. Construction progress here has proceeded a little slower, with construction work focusing on the concourse level slab. The casting works progressed towards the southern end of the station over the past quarter. Viaduct pier columns were also partially cast on either end of the station. The launch gantry sections which were delivered to the station site remain in the same locations that they were delivered to over the quarter.

27 January 2024 - An aerial view of the Jurong Town Hall station in early-Q1.

27 January 2024 - A close up view of the casting works for the concourse slab in early-Q1.

27 January 2024 - A close up view of the southern end of the station in early-Q1.

18 March 2024 - An aerial view of the Jurong Town Hall station in end-Q1.

18 March 2024 - A close up view of the northern end of the station where concourse slab casting
work was underway in end-Q1.

18 March 2024

27 January 2024 - Viaduct pier construction underway south of the Jurong Town Hall station.

24 February 2024 - Several piers under construction south of the station in mid-Q1.

24 February 2024

18 March 2024 - A viaduct pier column south of the station in end-Q1.

18 March 2024 - Not much progress on the viaduct piers as of end-Q1.

JE7 - Pandan Reservoir
The final station along phase 2's southern end has seen slow progress over the past quarter. On close inspection, it may even appear to be the same. Progress has been painfully slow. By comparison, work on the tail tracks running parallel to West Coast Road appear to be progressing at a quicker rate. Over Q1, several more viaduct pier columns have appeared along the work site.

27 January 2024 - An aerial view of the Pandan Reservoir station in early-Q1.

27 January 2024 - A close up of the northern end of the station in early-Q1.

27 January 2024 - A close up view of the southern end of the station in early-Q1.

18 March 2024 - An aerial view of the Pandan Reservoir station in end-Q1.

18 March 2024 - A close up view of the southern end of the station in end-Q1.

18 March 2024

27 January 2024 - The end of the line in early-Q1. Viaduct pier columns were under construction.

18 March 2024 - The end of the line in end-Q1. Viaduct pier columns were being cast.

27 January 2024 - A westward view of the viaduct construction site along West Coast Road in
early-Q1.

18 March 2024 - A westward view of the viaduct construction site along West Coast Road in end-Q1.

Progress over the quarter has been the greatest at the northern end of the contract, with most of the piers completed near Toh Guan station. As the contract approaches further south towards Pandan Reservoir, the level of progress reduces. We look forward to seeing how progress continues through in Q2 and will be back to provide a subsequent update.

This post will also be available on Instagram & Facebook on 9 May 2024.