The Express Rail Link (XRL) is one of the ten infrastructure megaprojects launched by the Hong Kong Government in response to the 2008 financial crisis. The project consists of an underground high-speed railway line going from Kowloon to the Chinese border and linking Hong Kong to the existing high-speed rail network in China.
The West Kowloon Terminus (WKT) is located in the western part of Kowloon, on the reclaimed but already mature urban area across the harbour from Hong Kong Island. The WKT extends over a surface of 12 hectares and comprises a 4-level basement to accommodate the railway station and a stabling facility.
Construction of foundations and retaining structures. Foundations include large diameter bored piles installed with steel stanchions and rock socketed H-piles, while retaining structures include diaphragm walls. The works also include slurry walls for water cut-off, barging facilities, associated road and utility diversions, micro-piles for underpinning of diaphragm walls, and toe grouting underneath diaphragm wall toe.
– Diaphragm walls: (a) 1.5m thick, (b) 1,600m long, (c) depth 24m to 56m, (d) excavation area 47,000m2
– Bored piles: (a) 177 nos., (b) diameter 3m, (c) depth 40m to 65m, (d) bored length 8,150m
– Rock socketed H-piles: (a) 890 nos., (b) diameter 610mm, (c) bored length 49,000m
– Micro-piles: (a) 224 nos., (b) 13m deep
– Slurry walls: (a) 2,875m2