C886 - C&C tunnels at Marina Bay

14 September 2022 - A view of the contract 886 work
sites for both the main line & turn back tunnels.

Contract 886 is for the construction of cut & cover (C&C) tunnels for Circle Line 6 at the Marina Bay area. This contract consists of 2 sections - the main line section and the turnback tunnel section. The tracks at Prince Edward Road (PER) station are in a stacked configuration, thus as they head eastwards to Marina Bay station, the tracks split into two directions. One set known as the main line tunnels, turns southwards to connect to the existing Marina Bay station while another set turns eastwards to end just before Shenton Way station on the Thomson-East Coast Line. This second set is known as the turn back tunnels and will serve to allow trains terminating at PER to reverse directions and commence their return journey at the correct level (as PER is of a stacked platform configuration, hence the tracks are on different levels).

14 September 2022 - A view of the main line tunnel
work site.

14 September - Several layers of struts are visible
within the trench, indicating that structural works are
still ongoing.

14 September 2022

14 September 2022 - Towards the eastern end, the roof
slab of the completed section of tunnel becomes
visible.

14 September 2022 - Roof slab of the completed tunnel
section.

09 August 2022 - A view of the tunnel work site at the western end of
the contract, abutting PER station.

09 August 2022 - A view of the excavation trench in which the tunnels
will be constructed at the western end of the contract.

Tunnels towards the eastern end of the mainline section appear to be more complete than those at the western end of the contract. Parts of the completed tunnel roof slab can be seen from the adjacent Marina Coastal Expressway. Do stay tuned as we continue updating on the construction progress of this extension in time to come.

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