J105 - Jurong West update Q1/Q2 2023

 

19 March 2023 - Viaduct piers under construction near contract J105's
Jurong West station site.

It has been a while since we've updated on the progress at Jurong West station under contract J105, the last update being towards the end of 2022. Similarly to Hong Kah station's update, we're doing one that sort of straddles between Q1 and Q2 of 2023. If we get around to getting more photos of the site that show visible differences, we'll be sure to update. Nonetheless, here's a recap of how things have progressed in Q1 and the first month of Q2. For this update, we'll be doing things chronologically. Do view all the photos after the jump.

5 February 2023
During this month, the road diversion around the station was still in effect, with the westbound lanes pushed to the north of the station piers. This was to allow for sufficient work space to allow for the construction of the station piers & associated foundations in the road median.

5 February 2023 - Station piers under construction at contract J105.

5 February 2023 - A close up of the under construction station piers.

Viaduct piers to the west of the station were also under construction and some being prepared for the hanger beams installation to begin the viaduct construction process. The pier crossheads were being constructed for the majority of the piers up to the junction with Jalan Bahar & Jalan Boon Lay.

5 February 2023 - An overview of viaduct pier construction near Jurong West station.

5 February 2023 - First pier being prepared for viaduct construction.

5 February 2023 - Remaining piers towards Bahar Junction station under construction.

5 February 2023

12 February 2023

The first set of hanger beams had been launched onto one of the pier crossheads while the construction of crossheads progressed on other neighbouring piers. A crossover will be located here to allow trains to switch tracks between stations and allow some flexibility in moving rolling stock due to the complicated track layout after neighbouring Bahar Junction station.

12 February 2023 - An overview of the viaduct piers under construction near Jurong West station.

12 February 2023 - A close up of the hanger beams installed.

12 February 2023 - Formwork installed for pier crosshead casting.

Meanwhile, circulars to residents had been put up to inform them of the upcoming road diversion along Jurong West Avenue 2. The westbound lanes of the roadway would be shifted back to their original alignment, with the station piers finally being in the road median as intended.

12 February 2023 - Circular to residents of the upcoming road diversion.

12 February 2023 - Diagram of the upcoming road diversion.

19 February 2023

Following the lifting of the hanger beams into position, the first sets of the segmented box girders (SBGs) were lifted into position. The hanger beams serve to allow the first set of SBGs to hang in place until they have been bonded to the pier crosshead with epoxy. Following that, the hanger beam will be removed and the lifting frame installed in its place. The lifting frame is capable of lifting the SBGs with its powered winch instead of relying on mobile cranes to lift the segments, something that the hanger beams are not capable of.

19 February 2023 - A view of the first pier with SBGs launched.

19 February 2023 - Station piers before the road diversion.

19 February 2023

19 February 2023

19 February 2023 - Pier with SBGs seen from street level.

19 February 2023 - A close up of the launched SBGs and the pier.

19 February 2023 - The piers and launched SBGs seen from a distance.

12 March 2023

The only update on this date was that the form work was being installed for the first launched SBGs of contract J105. This would allow the epoxy to be applied to bond the SBGs to the pier crosshead, and together with the post-tensioning works, allow the SBGs to be supported by the viaduct structure enabling the removal of the hanger beam.

12 March 2023 - A new pier rising up.

12 March 2023 - Installation of formwork to allow bonding of the SBGs to the pier crosshead.

12 March 2023 - Installation of the formwork.

19 March 2023
Formwork to commence the bonding of the SBGs to the pier crosshead had now been installed on both sides of the pier on the Jurong Pier bound trackway. Additionally, the crosshead for the subsequent pier to the west had completed casting and the formwork was being removed. This was being installed for the next pier to the west.

Also at the station site, the westbound lanes of the roadway were diverted back to their original location. The station was finally located within the road median as intended.

19 March 2023 - Formwork installed on both SBGs of the Jurong Pier
bound trackway.

19 March 2023 - A view of the station piers with the newly diverted
westbound lanes of Jurong West Avenue 2.

19 March 2023 - A close up of the station piers.

19 March 2023 - A view of the installation of formwork at the SBGs.

19 March 2023 - Completed casting of the subsequent pier crosshead &
the commencement of construction for the next pier's crosshead.

19 March 2023 - An overview of the piers to the west of Jurong West
station.

19 March 2023 - A view of the newly diverted westbound lanes.

19 March 2023

8 April 2023

Work to begin casting the station pier crossheads had commenced with the erection of scaffolding to support the formwork. Further west, the lifting frames had been delivered to site and the bonding of the SBGs to the pier crosshead appeared complete. The hanger beams, however, were still in place and awaiting changing out to the next pier to start the process there. The crossheads for the 2 piers next to the one with the SBGs launched had now been completed and formwork was being installed on the third pier.

8 April 2023 - A view westwards of the Jurong West station site and
viaducts further west.

8 April 2023 - A view of the station piers with scaffolding to support
the crosshead construction visible. Further west, the viaduct piers & SBGs
are visible.

8 April 2023 - A view eastwards from nearby the Bahar Junction station site of the viaducts to
the west of the Jurong West station.

16 April 2023
Scaffolding to support the construction of the first station pier crosshead had progressed and the platform was wrapped in construction netting. This would allow for workers to begin installation of the rebar to form the reinforced concrete crosshead.

16 April 2023 - Scaffolding for the station pier crosshead construction.

16 April 2023 - Formwork and rebar installation will follow.

Further west, a similar process was repeated for the casting of a viaduct pier crosshead. This was to the east of the first pier with the SBGs installed. As the Jurong West station utilises an island platform arrangement, this pier will serve to support the viaduct trackways as they diverge to allow the trains to pull up on either side of the central plaform. Meanwhile, SBGs for a second pier had been lifted up using the hanger beams. In total, 8 SBGs had since been lifted up across 2 piers. A final pier next to the junction of Jalan Bahar & Jalan Boon Lay was also nearing the crosshead level of construction. Judging by the length of the rebar left, it is likely that this pier will support SBGs of an extended span across the junction.

16 April 2023 - Crosshead construction for a pier near the station.

16 April 2023 - Epoxy has been applied to the SBGs launched.

16 April 2023

16 April 2023 - New set of SBGs launched at the next pier westwards.

16 April 2023 - The final pier before the road junction under
construction.

The progress at this site has been consistent. Given that it has been a while now since we last visited the site, we are curious as to how the site looks now. Do follow along as we provide updates on the various JRL construction sites, including this one, once we have some photos available. If possible, we'll try to do an update towards the end of this quarter.

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