Vertical geo drain: About half a million of vertical straw-like strips are inserted deep into the ground to drain water out from the marine clay.
Operationalising a Three-Runway System (End 2015 – 2020s est)
Changi Airport currently operates two runways, serving its four terminals. To ensure adequate runway capacity for the airport’s continued growth beyond this decade as well as to cater to the future T5, an existing third runway (Runway 3) used by the military will be converted for joint military-civilian use.
Runway 3 will be lengthened to 4km, and supporting taxiways developed, to connect it to the rest of Changi Airport. Here’s a quick overview of what needs to be done - extending Runway 3 from 2.75km to 4km to handle larger passenger aircraft, which involves pavement, drainage and associated works. Thereafter, more than 40km of taxiways will need to be built to connect Runway 3 to Runway 2. This will be followed by closing Runway 2 temporarily to allow for works such as underground tunnelling and the construction of additional rapid-exit taxiways.
The construction work will be carried out over several package contracts:
In October 2015, CAG awarded Package 1, a S$1.12 billion contract, to a joint venture formed by Samsung C&T Corporation and Koh Brothers. The works include pavement works, drainage works, security fencing and perimeter roads, mechanical and electrical works, as well as supporting works such as major services and road diversions. To facilitate this, Runway 3 is closed for about two years from 2016.
In August 2016, Package 2, valued at S$1.107billion, was awarded to a joint venture comprising Hock Lian Seng Infrastructure and Sembcorp Design and Construction. The works for this programme, which will be carried out near the airport’s existing Runway 2, include pavement works, drainage works, mechanical and electrical works, security fencing, perimeter roads, ancillary buildings, as well as other supporting works such as services and road diversions.
Progress of construction in 2017