Source: New Zealand Transport Agency – Press Release/Statement:
Headline: Stone column installation marks milestone for Baypark to Bayfair Link project
Installing stone columns involves putting vertical columns of stone (gravel) into the ground and using vibration to move the sand to make way for the stone. This will be done using a 80 tonne crawler crane with a 3.2 tonne ‘vibroflot’ attached – the vibrating element that carries out the compaction and delivers the stone.
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