Piled Beam Underpinning

Combining piles and traditional underpinning makes it possible to provide deep foundations where none existed before.

Piles of suitable depth are installed on either side of the structure (either driven, augered, or contiguous flight bored) and then beams are cast between them, providing a ‘bridge’ for the structure to sit on.

This technique is used when traditional underpinning becomes uneconomic, i.e. where the suitable bearing strata is deeper than 3m and the area to be underpinned is more than 4m or 5m.

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