The Harbour Area Treatment Scheme Project (Stage 2A) had been constructed for about six years. The main objective of the project is to improve water quality of the Victoria Harbour by constructing three deep sewage tunnels from North Point to the Stonecutters Island for the sewage conveyance system. The tunnels have a total length of 12km and at a depth up to 165m below ground. This project is a milestone for constructing one of the longest and deepest sewage tunnels by drill and blast method in Hong Kong.
In this CPD, Vicki is willing to share her experience in this tunnelling project. She will introduce the major surveying works from the very beginning of this project to the breakthrough of tunnels, such as establishing surface control network, transferring control stations from surface to the deep tunnels, and establishing tunnel control network. She will briefly talk about other important survey works such as setting out alignment of tunnels and As-built survey of tunnel profiles using laser scanner. The breakthrough accuracies of the tunnels will also be presented, followed by a discussion of factors that affect these accuracies. Some recommendations will be concluded for similar tunnelling project in the future.
Please email the reply form to cpd@hkies.org.hkfor registration.
All members and guests are welcome and the number of participants is limited to 30. Participants will be accepted on a first come first served basis. For enquiries, please contact Hilbert WONG (Tel: 96322751), or email to: cpd@hkies.org.hk.
Disclaimer:The Organizers have not arranged any insurance coverage for any participants on any personal accident, property loss/damage or virus inflection arising from this CPD function. Participants should make their own insurance arrangement at their expenses. | 
