Date, time & venue 
2013-10-05;9:30am – 12:00noon;Entrance of HATS 2A CRE office (179 Java Road, North Point, Hong Kong) (Please see attached map)

Programme Highlights

The scope of works of the Contract No. DC/2007/23 includes construction of a 12 km long sewage conveyance system (SCS) from North Point Preliminary Treatment Works (PTW) to Stonecutters Island (SCI) Sewage Treatment Works via. Wan Chai East PTW, Central PTW and Sai Ying Pun junction shaft, and construction of drop/junction/riser shafts at these locations.  The depth of the SCS is about 140-160 metres below ground level and sizes ranging from oval shapes of 1.7-5.6m2 to circular shape of 3m dia.  In addition, it is required to construct 3 nos. temporary production shafts each at North Point, Wan Chai East and Stonecutters Island to provide access for the construction of the SCS.

In this visit, participants can have opportunity to get a close up view on the production shaft, mucking system and noise enclosure at the site of North Point Production Shaft. The participants can also learn more about the blasting operation for the tunnel construction.

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.

Fee:

Free of charge

Registration & Enquiries

The number of participants is limited to 20 on a first-come first-served basis with priorities given to members of HKIE Civil Division. 

The registration was CLOSED as at 12:20pm on 28 September 2013, the number of applicants far exceeded the capacity.

Only successful applicants will be informed on or before 30 September 2013. 

For enquiries, please contact Ir William Luk at Tel: 9610 1101 or Email: enq.cvd.hkie@gmail.com.

Report
 Reported by Mr. Manuel Law

HATS Stage 2A involves the construction of a network of interconnected sewage tunnels and vertical shafts for the conveyance of the currently discharged preliminary treated sewage from the northern and southwestern parts of Hong Kong Island to Stonecutters Island for proper treatment; and the expansion of Stonecutters Island sewage treatment works to provide centralised chemical treatment for all sewage from the whole of the HATS catchment.

The scope of works of the Contract No. DC/2007/23 includes construction of a 12km long sewage conveyance system (SCS) from North Point Preliminary Treatment Works (PTW) to Stonecutters Island (SCI) Sewage Treatment Works via Wan Chai East PTW, Central PTW and Sai Ying Pun junction shaft, and construction of drop/junction/riser shafts at these locations.  The depth of the SCS is about 140-160m below ground level and sizes ranging from oval shapes of 1.7-5.6m² to circular shape of 3m dia.  In addition, it is required to construct 3 no. temporary production shafts at North Point, Wan Chai East and Stonecutters Island to provide access for the construction of the SCS.

The visit began with a project background presentation given by Ms.Angel Chong, Assistant Resident Engineerof AECOM Asia Co. Ltd. The participants got an overview on the scope of works of the project, current construction progress, detailed construction sequences and tunnel excavation with particular attention to the drill & blast and grouting technique. It was followed by an introduction of the overall HATS Stage 2Aconstruction project using the displayed model exhibited in site office.

The participants were then led to get a close up view on the production shaft, mucking system and noise enclosureset up of the production shaft at North Point. Ir Edith Sia, Resident Engineer of AECOM Asia Co. Ltd, explained in details the construction methodology of blasting operation and general logistics of the site.

Participants were then led to the purpose-built roof at the site office, where participants were shown an overview of the site as well as a rest place for site staff.

We would like to thank AECOM Asia Company Limited and Gammon Construction Limited for their support and effort to make this visit a success.

Photos of the Site Visit

Please read photo album "20131005 Site Visit to HATS2A"