Leighton Holdings

Contact us

Email alerts

SUBSCRIBE UNSUBSCRIBE  

print logo
Print this pageprint
Turn glossary on
68 of 157

Projects

Lai Chi Kok Transfer Scheme

Client:  Hong Kong Drainage Services Department
Location:  Hong Kong
Start:  November 2008
Finish:  July 2012
Contract Type:  Design and construct
Value:  US$156 million (at 30 June 2011)
Description:  

Leighton Asia has been awarded a contract for the design and construction of the Lai Chi Kok Transfer Scheme by the Hong Kong Drainage Services Department. The Lai Chi Kok Transfer Scheme is a drainage tunnel that will capture rainwater from the upper catchment in West Kowloon and discharge it into Victoria Harbour to alleviate flooding of the low lying, developed areas of Kowloon.

Leighton Asia will design and construct two storm water drainage tunnels (the main tunnel and the branch tunnel) with a total length of 3.7 kilometres, each with an internal diameter of 4.9 metres.The work also includes:
  • six intake shafts
  • a stilling basin
  • an outfall structure; and
  • approximately 270 metres of three metre internal diameter connection adits.

The main function of the intakes is to capture rainwater from streams and open channels and then convey them to the stilling basin via the drop shafts and branch tunnel. The branch tunnel will be constructed within a rock stratum while the main tunnel will pass through rock, mixed ground and soft ground strata.

The tunnels will be constructed by means of a tunnel boring machine (TBM) and the intake shafts will be constructed using traditional methods, drill and split or by blasting. The connection adits will be constructed using blasting techniques.