Mount Pleasant Excavation

The bored piling works are wrapping up and the piling rigs are gradually being demobilized. Casting of the capping beam for perimeter of the structure is still ongoing and topsoil removal is making way for the installation of the first strut level.

First Tunnel Completes

The first TBM that was launched from Tagore in August last year has completed excavation works at the Lentor station. The NFM-made slurry machine has performed a remarkably fast drive for the 1.1km northbound tunnel, with the final 85% (~1km) stretch of the tunnel completed within just 3 months. The TBM's backup gantries will begin to be dismantled and brought back to the Tagore site through the completed tunnel, before being refitted into the new TBM shield for the second drive.

The body of the existing TBM will be left underground and be integral to part of the permanent lining of the tunnel structure after it is lapped over with reinforced concrete segments, while dismantling of the cutterhead will be done once excavation on the Lentor side has reached the formation level.

TEL1/2 Tunnel Chart, March 2016

Caldecott Excavation (IV)

Excavation at the Caldecott station is nearly completed, and mining works for the Thomson Cripple Siding have commenced from the south cut and cover tunnel.

Upper Thomson Grouts

Numerous grouting are being carried out across the Upper Thomson station site where the first phase of the diaphragm wall works have completed. Piling works are taking place at the entrances. Tunnelling works are set to begin by the 2nd quarter following the assembly of the first TBM last month.

Assembled gantry crane and TBM 1 at the ULS

Piling at Bright Hill (VI)

Excavation works at the south launch shafts have commenced. The station roof slab is partially being constructed adjacent to the north cut and cover tunnel, while piling works are ongoing at the entrances and station box.

Excavation at the south launch shafts

Mayflower Excavation (II)

Excavation work continues at the Mayflower station.

Lentor D-walls (II)

The next stage of the diaphragm wall construction is beginning as the completed zone backfills and Lentor Drive gradually shifts back over the completed roof slab. The realignment of the intersection at Yio Chu Kang Road was carried out earlier this quarter and sheet piling works for the entrance at Calrose have begun.

Realigned YCK road over the completed underpass structure

Tagore Cast (II)

The completion of the first bored tunnel for the Thomson Line is coming up within the T208 project. The drive executed by TBM C for the northbound tunnel between the Tagore C&C and Lentor Station is over 90% completed. Maintaining an advance of an average of close to 8 rings per day since the start of the year, excavation of the tunnel is envisaged to complete by the middle of March.

The replacement cutterhead and TBM shield for TBM C has already been positioned at the surface of the north launch shaft in preparations for the second drive towards Springleaf.

French secretary of state for transport Alain Vidalies visiting the NFM TBMs at the Tagore C&C tunnel site in February (photo: NFM)

Springleaf Excavation

Installation of the first layer of strut are underway, marking the start of the excavation works at the Springleaf Station. The remaining bored pile works for the southern portion of the station continues and excavation for the entire station will be in full swing by the next quarter.

Facility Building Cast

Casting of the foundation of the escape shaft at the RTS Facility Building is underway. As of now, the northbound TBM has been launched at Springleaf, and is believed to have similarly launched at the SBAB launch shaft. Ground improvement works are ongoing for the cross passages.

Casting of the lower basement at the RTS facility building site where the 2 northbound TBMs would breakthrough

Mandai Depot & T206 (III)

All 5 TBMs for the project have been launched and are excavating the mainline and reception tunnels. The single-span replacement POB along Woodlands Avenue 2 was launched on February 5. The old bridge will be demolished and have its piles removed ahead of the relaunch of TBM S-893 for the RT3 drive at the end of the year.

Replacement POB in construction along Avenue 2

Woodlands South Diverts (II)

A partial reinstatement of Avenue 1 at the junction of Drive 16 makes way for the remaining diaphragm wall construction at the southern end of the station box. The completed roof slab at the north end of the station is being prepared for the diversion of the remaining stretch of Avenue 1 to complete the 3rd traffic diversion - which will be in place until the completion of the project in 2019.

Woodlands Excavation (III)

Excavation of the Woodlands station is progressing down to the S2 layer. The completion of the diversion at the Ave2/5 junction in December makes way for the secant bored pile works at the southern portion of the crossover tunnel. The temporary Woodlands Bus Interchange will open next Saturday allowing for the subsequent commencement of A&A works to the existing bus interchange and NSL station for the linkway connection.

Piling at Woodlands North (III)

Piling works, together with minor excavation and casting works progress at the Woodlands North site.