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Graduates and Students: Webinar on Rock cavern design and construction in Hong Kong

Event organised by ICE

29 April 2022
19:00 - 20:30 HKT (GMT+8)

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Please note that this webinar will be held on 29 April 2022 from 19:00 – 20:30 HK time.

Rock caverns are large man-made spaces in rock, which are usually associated with a specific usage including storage, industrial processes, commercial activities, and possibly habitation.

In Hong Kong, about 80 per cent of the steep terrain is formed by hard igneous rocks – granitic and volcanic rocks, this good geological setting is favourable to rock cavern development. Applications of rock caverns can achieve multiple societal benefits including avoidance of nuisance of NIMBY type facilities such as sewage treatment works and refuse transfer stations on surface sites and releasing surface land for sustainable development of Hong Kong.

In this webinar, the speaker will walk us through the history and benefits of rock cavern development in HK, some current and future major rock cavern projects, the rock cavern design approach & considerations, as well as the drill & blast technique for constructing rock caverns and technical knowledge of explosives.

  • Registration will be confirmed on a first-come-first-served basis, and priority will be given to ICE graduate and student members.
  • Only successful applicants will receive a confirmation e-mail.
  • Attendance certificates will be provided for this event only if attendees attend the whole event.
  • Applicants with no-show records will be given lower priority in future G&S events.


This event is being shown online. Register to get access.


Clayton Chan

Clayton Chan


executive director

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Clayton Chan

Mr Clayton Chan is an Executive Director of AECOM, who is also a sector leader leading the whole Tunnel & Cavern engineering team in HK region. He has over 23-year diversified experience in planning, design, construction, supervision and project management of numerous large-scale civil and geotechnical infrastructures in particular tunnelling/cavern projects in HK, Macau, Australia, UAE, India, Malaysia and Thailand.

These projects comprise a number of major roads, railway, cable, water, stormwater, sewer and utilities tunnels, with construction methods from drill-and-break, drill-and-blast (D&B), road header, tunnel boring machine (TBM), new Austrian tunnelling method (NATM), soft ground mining, cut-and-cover, pipe jacking, horizontal directional drilling (HDD), etc.

Prior to joining AECOM, he was working in explosives manufacturer and contractors for drill & blast / C&C tunnel projects. One of his expertise is design and construction of drill-and-blast tunnel/cavern works including designs of tunnel portal canopy, NGI Q-system rock supports, permanent lining, pipe roof/steel ribs/lattice girder for mixed / soft ground, blast pattern, blasting impact assessment, pre-excavation grouting (PEG) for groundwater control and explosive site magazine.

In his career life, he has successfully designed and implemented sustainable and innovative ideas on several challenging cavern projects in HK including Shatin sewage treatment works cavern (largest-span 32m cavern complex project), Tseung Kwan O-Lam Tin Tunnel (first semi-cavern housing ventilation building, first bifurcation cavern), MTR express railway XRL822 (longest 7.6km drill & blast rail tunnels, largest 650m rock cover tunnel under Tai Mo Shan and first rock crusher cavern)

He has been serving as Chairman of AGS(HK) since 2019, committee members of HKIE GEO working group on cavern & tunnel engineering and as a lecturer of HKUST on tunnel and cavern engineering course. He is a reviewer on Geoguide 4 – Guide to Cavern Engineering (2nd Edition) published in 2018. He has also published a number of technical papers on caverns, underground explosive magazine and underground quarrying.

For more information please contact:

Crystal Fung