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Vibration Monitoring at the Port of Las Palmas dock.
Vibration Monitoring Services Ltd were asked to carry out a vibration monitoring survey by O’Brien Specialist Crane Services to measure the vibration levels generated on the dock side during a crane collapse at the Port of Las Palmas. Profound Vibra+ monitors were sited at four locations and recorded the vibration levels generated as the crane collapsed onto the dock.
O’Brien Demolition took measures to reduce the impact on the dock side by creating a sand bed and using sections of demolished crane which were strategically positioned to lessen the crane’s impact when it hit the floor.
To weaken the structure of the crane, sections of the structure were removed or cut through to weaken it prior to the crane’s demolition which was brought down using steel cables attached to one large excavator.
The results of the monitoring showed that the measures taken reduced the impact on the dock, the highest level recorded was 21.82mm/s at 10.5Hz.
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