Observational Method Associated with 3D Analyses for HKBCF PCB Open Cut Excavation
Thu, 27 Feb
|Zoom
Ir. Alessandro Martucci (Associate Specialist Director, Tony Gee and Partners Asia Ltd)


Time & Location
27 Feb 2025, 6:30 pm – 7:30 pm HKT
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About the event
Synopsis
The Passenger Clearance Building (PCB) is located in the middle of the on newly reclaimed land HKBCF island and provides the customs and immigration facilities for passengers entering Hong Kong from the Hong Kong-Zhuhai-Macau Bridge and the Tuen Mun-Chek Lap Kok Link. Â
The construction of the PCB basement required an excavation of approximately 10 m depth within the fill layer, which overlies 20 m of very soft to soft Marine Clay. Extensive ground investigations indicated that the low strength of the Marine Clays posed a stability related challenge to the design of the basement excavation.Â
The standard design approach based on 2D stability analyses would have required extensive ground treatment, for example using cement injections. Instead, an innovative open cut solution was developed, using 3D modelling associated with observational method, taking advantage of the basement H-shaped geometry to fully account for the ‘edge effects’, which increase the stability when…
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