Mini-Piled Underpinning

/Mini-Piled Underpinning

Augered or driven; mini piled underpinning is a proven method for transferring the load from the existing foundation to stable ground at considerably greater depths than the traditional mass concrete method of underpinning.

Technical Info

Diameter: 100mm – 300mm.

Depth: 15m.

Ground Condition: variable.

Benefits

Ideal in places of limited access.

Greater depths are reached with ease.

Transfers load from foundations to stable soil.

Appropriate for polluted soil conditions.

Minimal disturbance to the surrounding area.

Process

Below ground level a hole is made through the existing foundation wall, this is in preparation for a needle beam to be cast through the wall to redistribute the load.

MINI PILES
Mini piles are augered to depth on each side of the foundation wall, they are installed adjacent to each other on opposite sides of the hole. The piles are cast in-situ with steel reinforcement and act as the tension bearing piles.

CANTILEVER NEEDLE BEAMS
The steel reinforcement starter bars poking out of the adjacent piles are connected together with a horizontal steel beam which passes through the hole made in the wall. Concrete is poured to fill in the gap and reinforce the newly installed beam.

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