Date, time & venue 
2012-02-04;09:00 - 12:00;AECOM’s Office (SOR) at 39 King Lam Street

Project Highlights

Due to inadequate capacity of the existing drainage systems, Sham Shui Po, Cheung Sha Wan and Lai Chi Kok areas are susceptible to flooding during heavy rainstorms.  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.  The project comprises the construction of a drainage tunnel of about 3.7km in length and about 4.9m in diameter from Chak On Estate to Victoria Harbour near Stonecutters Island; six intakes and about 270m of connection adits; a stilling basin and an outfall structure; and slope stabilisation works.  The tunnels will be constructed by TBM and will pass through rock, mixed ground and soft ground strata.  The connection adits will be constructed by blasting techniques.   

Gathering Point

Meet at the conference room on G/F inside AECOM’s Supervising Officer’s Representative Office (SOR) at 39 King Lam Street (location as shown on map attached).  Parking is not provided for site visit attendees.  

Rundown

09:00 – 09:10   Register at Security Guard’s Hut at entry of the SOR Office

09:10 – 09:30   Safety Induction by Contractor Safety Officer

09:30 – 10:30   Presentation of the project (RSS, AECOM), Q & A

10:30 – 11:45   Site tour & Group photos 

11:45 – 12:00   Distribution of CPD certificates

Safety Equipment

Participants must bring along their own safety helmets, safety reflective vest, safety shoes and a valid Green Card (or HKIE Corporate Membership Card) if available

Remarks

If any successfully enrolled participant does not turn up on the date of site visit without good reasons, his/her right to enroll HKIE Civil Division site visits will be suspended for 3 months after the date of the captioned site visit.

Enquiry

please contact Ir. Ian Chung / Ms. Ivy Chung at Tel: 3922 9847 or Email: ivy.yc.chung@aecom.com

Registration

The event is free of charge. The number of participants is limited to 20 on a first-come first-served basis. Please proceed online registration using the button at right hand bottom.

Report
 

By Ir Carrie Lau

On 4 February, 2012, Civil Division organized a technical visit to the Contract No. DC/2007/16 – Lai Chi Kok Transfer Scheme.

It is noted that most of the existing stormwater drainage system in Sham Shui Po, Cheung Sha Wan and Lai Chi Kok area were built decades ago. Owing to the rapid urbanization and change in land use over the years, the capacity of drainage system is no longer adequate. The Lai Chi Kok Transfer Scheme comprises the construction of two 4.9m internal diameter drainage tunnels (main tunnel and branch tunnel), totally 3.7km in length, which will capture rainwater from the upper catchment in West Kowloon and discharge into Victoria Harbour to alleviate flooding of the low lying, developed areas of Kowloon.

The Contract commenced in November 2008 and is expected to be completed by the end of this year. The consultant of the project is AECOM Asia Company Limited and the contractor is Leighton – John Holland joint venture.

The participants got an overview on the project background, scope of works, construction method, site constraints and also the current construction progress from a presentation given by Mr. Alex Mo of AECOM. The drainage tunnel with precast segmental lining was constructed by the Tunnel Boring Machine (TBM). In the presentation, the major components and operating details of the TBM and ancillary facilities, like slurry treatment plant and noise enclosures had also been introduced. The tunneling breakthrough of the branch and main tunnel were in January and December 2011 respectively. There are 6 intakes along the branch tunnel to collect the rainwater from hillside, through the stilling basin, the rainwater will be discharged into the main tunnel.  The main tunnel comprises an inverted siphon with inlet shaft M1 and outlet shaft M2 adjacent to Victoria Harbour near Stonecutters Island.

Following the safety induction, the participants were led to the construction site of stilling basin, where participants can see the inlet shaft M1 of the main tunnel, completed section of branch tunnel and the decked channel construction. Through the site tour, participants can get more in-depth information about the drainage system, site operation and construction sequence. Participants expressed particular interests in the temporary drainage diversion arrangement, tunnel construction and impact on the adjacent existing highways structures due to the proposed drainage works.

Finally, on behalf of HKIE and the participants, we would like to express our sincere thanks to AECOM and Leighton – John Holland for their effort in arranging the site tour and their knowledgeable presentation on the project.

Photos of the event

Please visit photo album 20120204 LCK Transfer Scheme