{"data":{"news":{"items":[{"title":"Gammon wins major contract for HKIA Terminal 2 expansion ","date":"2020-08-24 19:04:19","id":2395,"author":"","blurb":"","blurb_image_uid":"https://dxfpracgmlczp.cloudfront.net/2020/08/1598270921051_440d124342b5356a63b5e7 copy.jpg","blurb_expanded_image_uid":null,"article":"\n\t\n\n\n

Balfour Beatty announced today that its joint venture, Gammon, has secured a four-year HK$12.88 billion contract from the Airport Authority Hong Kong for the expansion of Terminal 2 at Hong Kong International Airport (HKIA).

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Gammon will be responsible for the expansion of the main Terminal 2 building and construction of interconnecting bridges, mechanical and electrical works as well as associated viaducts and roads.

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The expansion of Terminal 2 forms part of the Three-runway System (3RS) project at HKIA, which on completion will allow for both arrivals and departures from one terminal and increase overall passenger capacity.

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Leo Quinn, group chief executive of Balfour Beatty said, “This award marks Gammon’s second significant contract for the Airport Authority Hong Kong this year and the largest single contract ever awarded to Gammon.

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“Through leveraging wide-ranging engineering expertise and off-site and modular construction approaches, Gammon has secured a material share of the Hong Kong market, which continues to look favourable with significant infrastructure opportunities ahead.”

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In the first half of 2020, Gammon won a major tunnel contract at HKIA to deliver tunnels and associated works for an automatic people mover and baggage handling system, also part of the 3RS project.

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In a separate statement, Gammon’s chief executive Thomas Ho described the Terminal 2 expansion project as the ideal showcase to demonstrate the company’s capabilities in off-site construction and Design for Manufacture and Assembly (DfMA).

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“Our construction proposal focuses on off-site and modular solutions, especially for electrical and mechanical aspects and many of the internal fit-out elements of the main building such as check-in islands, retail shopfronts and link bridges. We’ll also be applying a kit-of-parts approach with a high degree of standardisation to a number of areas,” explained Mr Ho. “These approaches allow us to simplify and reduce complex construction activities and provide a significant reduction in on-site labour requirements, to improve both safety and the logistics of operating in the airport environment.”

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Mr Ho added, “We have an exceptionally strong senior management team for the Terminal 2 expansion works contract, which collectively brings more than 60 years’ experience of delivering projects at HKIA. Our understanding of the airport’s systems and procedures combined with our DfMA approach will support timely delivery of these important works. We are also pleased that by maximising off-site solutions we will be able to reduce construction waste, which is a key component of our sustainability strategy.”
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\nAccording to Gammon, it has long been a proponent of the digitalisation of construction and is expanding its 5G capabilities to support this approach. For the Terminal 2 expansion project, a number of in-house digital innovations will be used including an off-site fabrication monitoring solution, concrete management system, and sensors that track plant behaviour to ensure maximum productivity. The company said the project will employ about 3,000 staff and workers at its peak.

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Image: Balfour Beatty/Gammon

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The second phase of Global Switch data centre project in Tseung Kwan O, Hong Kong - being built by Gammon Construction - requires the design and installation of a chilled-water thermal-energy storage system using a Design for Manufacturing and Assembly (DfMA) approach.

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The chilled-water thermal-energy storage system provides resilience to ensure the chilled water remains available at all times, whether due to internal equipment or an external power failure. Gammon said the DfMA with full off-site fabrication could factor in the consideration of site safety, quality and duration of the construction for this vital equipment.
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\nThe final design consisted of four 175-cu-m thermal tanks, each weighing 50 t and measuring 7 m in diameter and 9 m high. Every element of the tanks – including all steel works, fencing, cat ladders, baffles, coating, thermal insulation and external cladding, and even maintenance provisions – was manufactured, preassembled and tested off-site in a DfMA factory. By doing so, Gammon eliminated the need for extensive scaffolding associated with high-level works, as well as the tremendous amount of on-site welding and painting activities, heavy lifting with complicated vertical operations, and confined space work inside the tanks.

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Before work began, Gammon adopted the building information modelling (BIM) to streamline and verify the design. The BIM method was applied to structural analysis to ensure integrity and use of correct steel members, while computational fluid dynamics made certain that the components inside the tank were appropriate for effective thermal transfer of temperature profiles.

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Once completed in the factory, the tanks were shipped by barge, hoisted to the roof and slid into their final positions in one action – no hot works and no high-level assembly were required, according to Gammon. Installation of the four tanks took four days, and they are also believed to be the heaviest DfMA thermal tanks installed in Hong Kong.

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All images: Gammon Construction

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