J108 - Tengah Park update Q2 2023

 

29 June 2023 - A view of viaduct & station pier columns at Tengah Park station site.

The past quarter (Q2 2023) has been a busy period for contractor McConnell Dowell over at contract J108 for the construction of stations and viaducts at Tengah Plantation, Tengah Park & Bukit Batok West. The portion of viaduct spans north of Tengah Park station up to the point where the line veers off Bukit Batok Road and into Tengah has been completed. Work on the station structure at Tengah Park has taken off with the columns visible at the street level before the concourse level is added in. A second launch gantry is also being assembled to commence viaduct span construction on the southern side of the station.

The section in which launch gantry Magnificent Mammoth will operate to construct the viaducts.

16 April 2023 - Construction of the fifth viaduct span by gantry Magnificent Mammoth.
Image by Alfred Yeo

16 April 2023 - Ongoing viaduct span construction as seen from Bukit Batok Road.
Image by Alfred Yeo

16 April 2023
Image by Alfred Yeo

16 April 2023 - A view of the station column stubs.
Image by Alfred Yeo

16 April 2023 - The launch gantry visible in the distance.
Image by Alfred Yeo

16 April 2023 - An aerial view of the site.

16 April 2023 - A close up view of the launch gantry.

16 April 2023

16 April 2023

16 April 2023

16 April 2023

29 April 2023 - The launch gantry Magnificent Mammoth working on its sixth span.
Image by Alfred Yeo

29 April 2023
Image by Alfred Yeo

Magnificent Mammoth's progress as at end-April 2023.

April 2023

There are a total of 26 individual spans required for the viaduct section between Tengah Park & Tengah Plantation stations. As of end-April 2023, 6 of these spans had been completed or were in the process of being launched. The speed of construction definitely picked up since viaduct launching works commenced in January 2023 - initially at the speed of approximately 1 span a month.

Meanwhile, works at the station were progressing with the rebar stubs for the columns now visible on site. Slowly, more rebar was added to the columns at the northern edge of the station and the columns were wrapped with scaffolding & construction netting ahead of eventual casting.

7 May 2023 - Construction of the seventh viaduct span in progress.

7 May 2023

7 May 2023 - A close up view of the mechanisms securing the spans and segmental box girders.

7 May 2023 - Segmental box girders for the seventh span suspended in sequence before post-
tensioning works take place and the span lowered into place.

15 May 2023 - The seventh span has since been lowered into place.
Image by Alfred Yeo

15 May 2023
Image by Alfred Yeo

15 May 2023
Image by Alfred Yeo

28 May 2023 - Launch gantry Magnificent Mammoth working on the eighth viaduct span.

28 May 2023

Viaduct construction progress as at end-May 2023.

May 2023
By the end of May 2023, a further 2 viaduct spans had been added to the total spans in progress. This brings the number of spans constructed up to 8 spans of 26 required to connect the 2 stations together. The speed of construction was maintained at 2 spans per month.

2 June 2023 - Work in progress for the ninth span.

2 June 2023 - A second launch gantry on site at the southern end of Tengah Park station, awaiting
lifting into position for construction.

2 June 2023 - Station columns at Tengah Park gradually creeping upwards.

2 June 2023

2 June 2023

2 June 2023 - Viaduct span nine being constructed by Magnificent Mammoth.

2 June 2023

2 June 2023

2 June 2023 - A view of the southern end of Tengah Park station.

2 June 2023 - The oblong shaped piers will enable the transition between viaduct and station.
Unlike previous MRT lines, the viaduct spans are not constructed through the JRL stations.
Instead, the station structure itself will be designed with a trackbed portion in the structure to
support the trackways and allow trains to pass through without the need for constructing viaduct
spans through the station, allowing easier maintenance of structures.

2 June 2023 - Rebar for station columns installed. The columns are noticeably taller than before.

15 June 2023 - A view of the Tengah Park cripple siding from Jurong East. Bukit Batok West
estate is visible behind.

15 June 2023 - A close up of the portal piers that will support the cripple siding south of Tengah
Park station.

15 June 2023 - Preparation underway for the upcoming lifting of the second launch gantry.

15 June 2023 - Further portal piers under construction.

15 June 2023

15 June 2023

15 June 2023 - A close up of lifting preparation works.

15 June 2023 - The base of a pier column coming up.

25 June 2023 - A view of the Tengah Park work site as seen from Toh Guan.

25 June 2023

29 June 2023 - Piers under construction at the cripple siding site.

29 June 2023 - Two supports erected to hold the launch gantry in place.

29 June 2023

29 June 2023 - A view of the station columns at Tengah Park.

29 June 2023

29 June 2023

29 June 2023 - The tenth viaduct span constructed by Magnificent Mammoth, and the last span for
a few months after.

29 June 2023

29 June 2023 - As far as the viaduct goes for now.

29 June 2023 - Further piers within Tengah new town are under construction and not yet ready
for viaduct span construction. The nearest one in this image does not yet have a crosshead cast.

Progress of viaduct construction as at end-June 2023. Any further progress is slightly constrained
by the lack of completed piers to connect viaduct spans to.

June 2023
As of end-June 2023, the launch gantry named Magnificent Mammoth had completed the remaining 2 available spans, bringing the total of spans constructed to 10. Following this milestone, the gantry will be taking a break as further viaduct piers are made ready. We expect that the northern-most piers of Tengah Park station will be expedited so that the viaduct connection can be completed, following which the gantry will be relocated to the northern end of the completed stretch to continue its journey towards Tengah Plantation station.

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This post will also be available on Instagram & Facebook on 10 August 2023.