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Settling down

Settlement was always an issue at Chek Lap Kok. The airport platform sits on material that varies from solid rock to 15m to 20m of reclaimed fill overlying 20m to 30m of lightly over consolidated alluvial sediments. Typically the platform settled 1.5m during construction with rates varying from 1mm to 3mm a week with most occurring under the northern runway sited on new fill. Observed settlement has gratifyingly matched numerical predictions. Long term monitoring will continue.

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