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Bored Piles – Installation of rebar cages in wet concrete

Here is the system many contractors have been waiting for

 

Driving a rebar cage into a pre-drilled hole with wet concrete has so far been toublesome – and often with risk for the crew.

To overcome the disadvantages and shortcomings Dawson have designed a new unique system, that makes use of a special spreader beam and a hydraulic pile vibrator with patented clamps

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The Dawson Rebar Cage Driving System Method

• The rebar cage is safely brought into position over the drilled hole with wet concrete (the pile) by means of a crane suspended spreader beam with slings in the ends,
• The cage sinks by itself to refusal depth in the wet concrete due to its own weight – often halfway down.
• A Dawson hydraulic pile vibrator with a patented, unique self-adjusting clamp system is mounted to the spreader beam. it is lowered over the rebar cage and the clamp system clamped to it.
• The cage is driven further into the wet concrete pile with the vibratory hammer.

 

The vibratory hammer allows a smooth and rapid driving of the cage and aids to an effective settlement of the wet concrete mix.

 

The principle is shown in the video below.

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The product is under extensive tests. More details will be presented when finalized.

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