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| 10 March 2024 - An aerial view of the station site. |
Through the first quarter, we managed to visit the Defu station site at least twice and have noted the good progress made at the western end of the station. It is likely that the launch shaft for tunneling works towards Hougang station will be located here. As such, this section has been given priority in diaphragm walling works, with the works moving further away from the area gradually.
In the middle of the quarter, works were still ongoing for soil improvement where the launch shaft is to be excavated in the coming months. The outline of the completed earth retaining & stabilising structures (ERSS) could be seen below. However, work had yet to begin on casting the guard walls to prevent items from dropping into the excavation trench once soil removal works began.
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25 February 2024 - An aerial view of the station site in mid-Q1. Soil improvement works were
ongoing at the launch shaft area. |
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25 February 2024 - A close up view of the completed diaphragm walls and soil improvement
works near the launch shaft area. |
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25 February 2024 - Ongoing earth retaining & stabilising structures closer to the eastern end of the
station. |
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| 25 February 2024 - A view of the contract site from street level. |
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| 25 February 2024 |
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| 25 February 2024 |
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| 25 February 2024 - Ongoing work within the site. |
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25 February 2024 - Diaphragm wall works continued through mid-Q1 with a hydrofraise and
clamshell grabber on site. |
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| 25 February 2024 |
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| 25 February 2024 |
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| 25 February 2024 - Rebar cage being installed for the diaphragm wall. |
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| 25 February 2024 - The former bridge over the canal has been demolished before being rebuilt. |
Towards the end of the quarter, works had progressed with some excavation beginning to unveil the completed parts of the diaphragm wall just below the surface. Guard walls were in the process of being cast as well as excavation would slowly begin to create the launch shaft for the TBMs to begin the tunneling work. Additionally, land towards the south of the station site and next to the ongoing work for the ERSS system & launch shaft was being compacted ahead of an upcoming road diversion which is due to come into effect from 27 April 2024.
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| 10 March 2024 - Casting works underway for the guard wall atop the completed diaphragm wall. |
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10 March 2024 - A close up view of the works. A steamroller can be seen at the top right corner,
compacting soil ahead of an upcoming road diversion. |
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| 10 March 2024 |
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| 10 March 2024 |
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| 10 March 2024 - King posts visible further into the site. |
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| 10 March 2024 - A view towards the eastern end of the site. |
The road diversion will be part of the second phase of road relocation works to allow construction of Defu station. Circulars were released by the Land Transport Authority (LTA) and contractor for the contract. Due to take effect over 2 days from 27 April, the diversion will see the eastbound carriageway swung from the northern edge of the site to the southern edge of the site, placing the carriageway next to the westbound carriageway once again.
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| A circular issued by the Land Transport Authority (LTA) & contractor. |
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| A diagram of the reconfigured road network after the diversion. |
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| 18 April 2024 - Preparatory works for the eastbound road diversion. |
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18 April 2024 - A view of the two bus stops, the existing shelter on the left and the shelter for the
diversion on the right. |
With preparatory works in place, the road diversion is due to be put into effect tomorrow. Do stay tuned as we recap all the works taking place in our next update.
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