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A world record for driving steel casings is claimed by piling and geotechnical equipment manufacturer MGF of Germany.

In Hong Kong, contractor Gammon Construction has driven and extracted 3.5m diameter casings to a depth of 110m in hard soil with obstructions using an MGF vibratory driver/extractor model RBH 1575 says the manufacturer. The vibrator was driven by an MGF hydraulic power pack run by a 785kW Cat diesel engine. Gammons technique for these extremely long casings involved the use of a second, oversize, sleeve which was driven to approximately half the full depth to allow a staged excavation so as to reduce friction on the deep casing.

New developments on show at Bauma 98 will include the DBA 18 hydraulic rotary piling rig which can reach depths of 60m with its five section kelly driven auger.

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