Tuesday, April 15, 2014

Tendering Concludes

Tendering for Contract T228 closed today, ending the 18 month-long bidding process for the TSL's 25 main civil contracts which began in late 2012. A list of contractors that have bid and are successfully qualified will be released in an attached spreadsheet. 15 contracts have been awarded so far with a total sum of S$4.46b.

Tender Award Process
Within the next 5-8 weeks, the authorities would assess the bids and quality of the various contractors before revealing the bid amount to the public. The successful contractor would have more or less been decided by then. It will take another 3-6 weeks before LTA publicly awards the contract.

Here's a list of the contracts that have been awarded:

July 2013
T206 - Construction of Tunnels between Woodlands Station and Woodlands Avenue 12 including Crossover Tunnels and Reception Tunnels to Mandai Depot for Thomson Line
Shanghai Tunnel Engineering Co | Awarded Amount - S$421,588,626 
T213 - Construction of Caldecott Station and Tunnels for Thomson Line
Samsung C&T Corporation | Awarded Amount - S$284,797,000 

August 2013
T205 - Construction of Woodlands South Station for Thomson Line
Woh Hup | Awarded Amount - S$143,763,700 

October 2013
T201 - Construction of Mandai Depot
Jurong Primewide | Awarded Amount - S$329,403,686
T203 - Construction of Woodlands Station and Cut and Cover Tunnels for Thomson Line
GS Engineering & Construction Corp | Awarded Amount - S$292,200,000
T209 - Design And Construction Of Lentor Station And Construction Of Tunnels For Thomson Line
China Railway No.5 Engineering Group Co | Awarded Amount - S$247,176,282.89
T210 - Design and Construction of Mayflower Station for Thomson Line
Gammon Construction Limited Singapore Branch | Awarded Amount - S$174,348,000

November 2013
T202 - Construction of Woodlands North Station and Tunnels for Thomson Line
Penta-Ocean Construction Co Ltd | Awarded Amount - S$337,000,000
T208 - Construction of Springleaf Station and Tunnels for Thomson Line
Leighton Contractors (Asia) Limited (Singapore Branch) - John Holland Joint Venture | Awarded Amount - S$383,330,533
T212 - Construction Of Upper Thomson Station and Tunnels For Thomson Line
Sato Kogyo (S) | Awarded Amount - S$373,958,250
T217 - Construction Of Napier Station and Tunnels For Thomson Line
Sinohydro Corporation Ltd. (Singapore Branch) | Awarded Amount - S$188,800,000

January 2014
T207 - Construction of Tunnels from Crossover Tunnels to Springleaf Station for Thomson Line
Shimizu Corporation | Awarded Amount - S$189,785,000

February 2014
T211 - Design and Construction of Sin Ming Station and Construction of Tunnels for Thomson Line
Penta-Ocean Construction Co Ltd | Awarded Amount - S$454,420,000
T221 - Construction of Springleaf Station and Tunnels for Thomson Line
Gammon Construction Limited Singapore Branch | Awarded Amount - S$210,348,000
T226 - Construction Of Marina Bay Station and Tunnels for Thomson Line
Taisei Corporation | Awarded Amount - S$424,880,000

And here's a list of the contracts with the estimated month of award:

April 2014
T215 - Construction of Mount Pleasant Station and Tunnels for Thomson Line
T216 - Construction of Stevens Station and Tunnels for Thomson Line
T223 - Construction Of Maxwell Station for Thomson Line

May/June 2014
T218 - Construction of Orchard Boulevard Station for Thomson Line
T220 - Construction of Great World Station and Tunnels for Thomson Line
T222 - Construction of Outram Park Station and Tunnels for Thomson Line
T225 - Construction of Shenton Way Station and Tunnels for Thomson Line

July 2014
T219 - Construction of Orchard Station and Tunnels for Thomson Line
T227 - Construction of Marina South Station and Tunnels for Thomson Line
T228 - Construction Of Gardens By The Bay Station and Tunnels for Thomson Line

Wednesday, April 9, 2014

Napier - Final Preparations

We go aerial at the NPR site today. Contract T217 oversees the construction of Napier station and the adjacent tunnels to Orchard Boulevard. The site has already seen repetitive sewer diversions around the junction of Napier/Cluny Road as mentioned in the previous update. The area south of the station where the launch shaft is to be located has been cleared as well. The site office is located at the western end of the site.

Contract T217
Napier station will be stacked and designed in-house by LTA, featuring 3 levels - Subway/Concourse/Upper Platform (B1), Mezzanine (B2) and Lower Platform (B3, RL82.55). The station has been designed with knock out panels for a future underground infrastructure to cut through the mezzanine level. 2 barrier-free entrances will be built on either sides of Napier Road.

Excavation of this station will be vastly relied on dynamite blasting. Due to the sensitivity of the area, noise barriers as high as 12m will be constructed around Gleneagles and MFA around the station site. The POB at Gleneagles will be demolished.

A launch shaft will be built south of the station to facilitate 2 launches by a single TBM. The TBM will be slurry-type. The lower northbound tunnel will be bored first. Upon completion of the upper tunnel, all TBM accessories will be retrieved while the shield is abandoned in situ. The upper tunnel will then be bored with a new shield.

A cross passage will be located along Sherwood road, behind the PRC's Embassy. Due to the semi stacked configuration of the tunnels, this CP will be constructed by excavation from the surface to a depth of 42m and an audit will be mined to link both levels of tunnels. The excavation site will be eventually capped and backfilled hence does not serve as an escape shaft.

Site overview of the station box (Looking SE)
Final power grid diversions along Holland Road (looking SW)

Thursday, April 3, 2014

Springleaf - Start is here

Contract T208 is for the construction of Springleaf station and tunnels to Lentor station. Site clearing has commenced at the station location and the site office is mostly completed.

Saturday, March 29, 2014

Woodlands South - It's Beginning

Continuing on from the previous update, we have a closer look at the WDS site today. The silos which were seen last month have now been hoisted up while site clearing is still in progress. The actual station box will sit beneath the existing Avenue 1/Dr 16 junction, to the bottom right of the picture.

Silos in yellow erected at WDS

Monday, March 24, 2014

Upper Thomson Clears

We look at Contract T212 which oversees the construction of Upper Thomson station as well as twin bored tunnels between UTS and CDT stations. About 1/3 of the marked trees to be cleared have already been chopped, while utility diversions are still underway as of today.

More information will be released upon commencement of construction. T212 will see the construction of 2 main C&C structures - Upper Thomson Station (UTS) and Upper Thomson Launch Shaft (ULS). The launch shaft will be an isolated structure built between UTS and Caldecott stations, located directly beneath the existing Upper Thomson Road, in front of Shunfu Gardens. A road diversion within the next few months would be necessary to facilitate the shaft and subsequently tunnel works. A single TBM will launch twice from ULS to UTS while 2 TBMs bore towards CDT. The site office is being constructed infront of Shunfu Estate.

Railings along the centre divider being demolished

Sunday, March 2, 2014

Construction update

Just a quick and simple update of the sites that have begun construction.

  • Mandai depot - site clearing
  • Woodlands - site office set up
  • Woodlands South - site office & machinery on site
  • T206 - site office & site clearing
  • Mayflower - site office & machinery on site
  • Caldecott - site office & site clearing
  • Napier - site clearing

Saturday, March 1, 2014

Works begin - Mayflower

Works have commenced at the site of Mayflower station with contractor for T210 - Gammon Construction - moving machinery on site. Currently, a test pile is being constructed and this marks the initial stage of construction ahead of further site clearing, construction of the earth retaining system and subsequent construction of the station superstructure. Gammon's site office has also been completed and works will begin in earnest soon.

A Gammon banner can be seen on the crane to the left.