Wednesday, 11 October 2017

Marina South Cast (III)

Excavation works for the station zone adjacent to the cut and cover tunnel are progressing down to the formation level. The first completed portion at the center of the station sees the structure cast all the way up to the basement roof slab. Bored tunnelling works on the Woodlands bound drive is on its main drive with a third of the progress completed.

Marina Mall was diverted at the T228 interface at the end of Q3 for the cut and cover tunnel construction adjoining the Gardens By The Bay Station. Backfilling works across the completed portion of the C&C tunnel are underway.

Structure progressing at Marina South
Sheet pile construction and ground improvement works for entrance B and subway leading to the opposite entrance A (bottom)
TBM segments at shaft surface

TBM main drive underway
Muck cars supporting the excavation works
Temporary rings surrounding the Woodlands bound tunnel
Tunnel eye of the Changi bound launch point
Replacement CREG TBM shield and cutterhead for the subsequent Changi bound drive arrived on site.

Station progress

Mezzanine level
View of the completed Woodlands bound trackway

Casting of mezzanine slab

Completed concourse slab (escalator pit to the linkway level)
Excavation of subway to entrance D and vent shaft 4

Excavation works at the connection to the cut and cover tunnel

Extent of completed tunnel roof structure

Backfilling works

Temporary staging area portal openings for T250
Portal openings for the Woodlands (top) and Changi (bottom) bound trackways

Diverted Marina Mall for the crossover tunnel construction between the cripple siding and the interfacing GRB station

Pipe pile extension from the existing structure prior to the road diversion

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