The Island Division is responsible for geotechnical control of all building developments and civil engineering works on Hong Kong Island. One of the recent projects that requires high professional and technical inputs of the Division is the Re-provision of Water Reservoirs for the Centennial Campus Development of the University of Hong Kong. The geotechnical works of the project comprise the construction of two caverns of total volume about 30,000 m³. Each cavern is about 50 metres long, 17 metres wide and 18 metres high. The underground space created will house two service reservoirs which supply salt water to the Central and Western District. As part of the project, a 20-metre high retaining wall along an emergency vehicular access will be constructed and a series of slopes will also be upgraded. In addition, natural terrain hazard mitigation works on the hillside overlooking the site will be carried out.

Excavation Started	Service Reservoir Construction Started
Benching Formed	Cavern Excavation Completed
Cavern Construction

General View of the Site
(photographs are provided by courtesy of the University of Hong Kong)

Other major projects with substantial geotechnical input from Island Division include:

• Ocean Park Redevelopment Project
• Hong Kong Western Drainage Tunnel
• Harbour Area Treatment (HATS) Stage 2
• West Island Line of MTR
• South Island Line of MTR

In addition to the above, this division is responsible for carrying out slope maintenance audit to assist maintenance departments to improve their performance in discharging their slope maintenance responsibility. It also manages the system for certification of permanent prestressed ground anchors used in Hong Kong.

If you wish to obtain more information about the work of Island Division or have comments relating to our services, please contact Ir C K Wong, Chief Geotechnical Engineer/Island at 2762 5266.