J105 - Jurong West update Q2 2023

 

15 June 2023 - Concrete pumping in progress for the casting of the station concourse slab.

To finish off our Q2 2023 updates on the Jurong Region Line (JRL) phase 1, we visit contract J105 for the construction of Jurong West station. We had earlier done an update between Q1 & Q2, hence this update will cover the updates of the remaining months for Q2 2023.

7 May 2023 - Station pier columns and the beginning of formwork for
the concourse level crosshead looking eastwards.

7 May 2023

7 May 2023 - Station pier columns and the beginning of formwork forthe concourse level crosshead looking westwards.

7 May 2023

28 May 2023 - Excavation pit for the foundation of the final pier on the eastern end of the station.

28 May 2023 - Installation of rebar for the concourse level crosshead.

28 May 2023

28 May 2023 - Work for the remaining piers on the western end of the station. The pier on the left
is for the viaduct, with rebar for the pile cap installed. The pier on the right is for the station.

11 June 2023 - Formwork installed for the casting of the station concourse level crosshead. A
further pier behind is in the midst of having the support structure installed for construction of
the crosshead.

11 June 2023 - Rebar for the concourse level columns installed prior to the crosshead casting.

11 June 2023 - A view of rebar installed for concourse level columns. Also visible is the tensioning
wires used to provide structural strength for the crosshead.

11 June 2023 - A view of the formwork being installed for the next crosshead.

15 June 2023 - Concrete pumping & pouring for the first crosshead underway.

15 June 2023 - Concrete pump machine in action pouring concrete for the crosshead.

15 June 2023 - A view of subsequent piers and crossheads under construction.

15 June 2023 - The view of the station piers remaining towards the east.

29 June 2023 - A view of the completed crosshead following casting as seen from a distance.
Another crosshead is in the process of being constructed.

29 June 2023

Station
Since our last update in April 2023, works at the station have progressed to include 1 completed concourse level crosshead, 1 crosshead in the midst of casting and a further 1 crosshead at the rebar installation stage. A total of approximately 10 station piers will need to undergo this process, hence the progress to completion of the crosshead piers is approximately 25% as of the end of Q2 2023. Throughout the quarter, work has been largely focused on the casting of the initial 3 crossheads, in addition to the completion of the remaining 2 station piers following the diversion of the road to place the station in the road median.

7 May 2023 - Hanger beams and lifted segmental box girders (SBGs) can be seen on 2 viaduct
piers.

7 May 2023 - The crosshead for a movement joint pier under construction.

7 May 2023 - The view of viaduct and station piers.

7 May 2023

7 May 2023 - A view of the viaduct piers along Jurong West Avenue 2 looking eastwards.

7 May 2023

7 May 2023 - A close up view of the hanger beams and the tensioning platform.

7 May 2023 - A close up view of the viaduct pier with hanger beams and formwork for joining
the the SBGs to the pier crosshead.

7 May 2023 - A view of winches for the lifting frame.

7 May 2023

7 May 2023

7 May 2023 - A view of the viaduct piers to the west along Jurong West Avenue 2.

28 May 2023 - Lifting frames on the viaducts west of the station.

28 May 2023 - Lifting frame atop the first viaduct pier crosshead.

28 May 2023 - Bonding of the SBGs to the pier crosshead has
been completed on the second pier.

28 May 2023 - Hanger beams have been installed on the third
pier crosshead.

28 May 2023 - A view of the viaduct piers looking westwards.

11 June 2023 - Lifting frames connected to the SBGs for
installation.

11 June 2023

11 June 2023 - Crosshead for the movement joint pier after
casting was completed.

11 June 2023 - A view of the viaduct piers looking westwards.

11 June 2023

15 June 2023

15 June 2023

15 June 2023

15 June 2023

15 June 2023

15 June 2023

Viaducts
Over the last quarter, work has been confined somewhat to the 4 viaduct piers between Jurong West station and the road junction with Jalan Bahar, Jalan Boon Lay & Jurong West Avenue 4. Ultimately, this stretch will see a total of 8 piers to support the viaduct spans. As of the end of the quarter, a total of 6 piers had been cast up to the crown level, with 5 having their crossheads completed. The remaining pier without a crosshead constructed sits at the road junction and will need its twin column to be constructed before the portal beam can be cast in place of a typical crosshead.

Work at the remaining 2 piers was still focused on the foundation elements. Of the 5 piers that had completed crossheads, 4 had begun the launching sequence for viaduct segmental box girders (SBGs). A total of 8 hanger beams were used to lift the first segments on each side and trackway while a set of 4 lifting frames took over the work following the installation & bonding of the first segments. The lifting frames are capable of lifting the SBGs into position through the use of a winch whereas the hanger beams merely serve to allow the initial SBGs to be hung in position to begin the launching sequence.

Upcoming works over Q3 2023
Over the next quarter, works at the station can be expected to centre around completion of the concourse level crossheads. One should expect a further 3 to 4 crossheads to be under construction or completed by the end of Q3 2023 according to progress seen in Q2. One can also expect that at least 1 viaduct span be completed by the end of Q3 as progress for launching beyond the initial segment has been somewhat slow, despite the quick initial launches seen. Do stay tuned as we bring you further updates on progress along the JRL in time to come.

This post will also be available on Instagram & Facebook on 21 July 2023.