Back
The World Federation of Engineering Organizations celebrated World Engineering Day for Sustainable Development 2022 on 4 March 2022 under the theme of “Build Back Wiser – Engineering the Future”. There were 135 registered events globally aimed to highlight engineers’ and engineering achievements, and improve public understanding of how engineering and technology are vital to modern life and sustainable development. To celebrate the Word Engineering Day in Hong Kong, a half-day webinar under the theme of “Building a Smart, Green and Resilient City - The Case of the Tung Chung New Town Extension” was jointly organised by the Civil Engineering and Development Department (CEDD) and CV Division on 5 March 2022.
The webinar was well received by nearly 900 participants.The Organising Committee had thoughtfully put together a comprehensive programme covering a wide range of topics, including the concept of a smart, green and resilient city in the Tung Chung New Town Extension (TCNTE) by Ir Raymond Ip, deep-cement-mixing method (a non-dredged method for reclamation) and the role of geotechnical centrifuge modelling in reinforcing the design approach and optimising deep-cement-mixing design by Prof Charles Ng and Ir Chris Cheung, sustainable solutions including common utility tunnels by Ir Connie Chan, eco-shorelines by Prof Kenneth Leung, and river parks and river revitalisation by Ir Kenneth Kwok.
“I am sure the speakers today have successfully demonstrated what Hong Kong engineers and the engineering profession have done, taking Tung Chung New Town Extension as a case, in advancing the United Nations Sustainable Development Goals,” as said by Ir Michael Fong, Chairman of the CV Division at the closing remarks. The webinar was held at an appropriate time for the concept of a smart, green and resilient city in the TCNTE, together with sustainable methods and developments and technology advancements that could be appreciated and shared.
The panel discussion sessions after the presentation encouraged the participants to exchange views and comments on various sustainable smart and green solutions that would be suitable for the TCNTE.
The captioned webinar was organised by the CV Division on 25 May 2022. Mr Alex Lam, an Engineer of the Drainage Services Department, started by introducing the project Expansion of the Sha Tau Kok Sewage Treatment Works (STKSTW).
The existing STKSTW provides secondary-level treatment for sewage collected from Sha Tau Kok township (including Yim Liu Ha, Tsoi Yuen Kok, and Sha Tau Kok Chuen). It was commissioned in 1989 with a design capacity of 1,660 m3/day of average dry weather flow (ADWF). This expansion project comprised the following:
-
Construction of sewage treatment facilities for expansion of the STKSTW to increase the treatment capacity in stages to at least 5,000 m3/day at ADWF;
-
Construction of a new submarine outfall and two gravity sewers; and
-
Decommission of the existing Sha Tau Kok Sewage Pumping Station (STKSPS) and the rising main between STKSPS and STKSTW and associated ancillary works.
Mr Kevin Chan, the Resident Engineer (Civil) of Binnies Hong Kong Limited, shared some design considerations for the proposed submarine outfall including the impact on sensitive receivers nearby, environmental issues and the visual impact. The starting point of the submarine outfall was designed to be located within the STKSTW in order to minimise the disturbance to the public and avoid the need for any land acquisition. The endpoint of the submarine outfall was located near Ah Kung Tsui which is favourable for mixing and dilution of effluent as the sea level of the proposed location is deep enough.
Mr Ron Hung, the Site Agent of Build King – Kum Shing Joint Venture (BKKSJV), shared his work related to the on-site arrangement and construction of the submarine outfall. This project adopted a two-way HDD method on land and sea sides.
The technical seminar/webinar concluded with a question-and-answer session. On behalf of the CV Division, we would like to express our sincere thanks to Mr Alex Lam, Mr Kevin Chan, and Mr Ron Hung for their insightful presentation.