BOTTOM DRIVEN PILES

 

Balfour Beatty Ground Engineering

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The installation of bottom driven piles is quick and efficient.

A thin walled steel tube, closed ended, is driven in lengths of 2 to 6m using an internal drop hammer on to a dry concrete plug. The tubes are joined by a full fillet weld as the installation proceeds.

The depth of the piles are designed using a predetermined set or length criteria.

Once the required depth is reached the tube is filled with high slump concrete or grout. A single bar or cage is then inserted.

These piles are suitable in most ground conditions. Costly spoil removal is not required, a particular advantage on brownfield sites.

Advantages of bottom driven piles

  • Small lightweight equipment

  • Low noise and vibration

  • No spoil to be removed

  • Minimal site preparation

  • Piles self-testing when driven to a set

  • Can be installed successfully into most ground conditions including peats, soft clay and loose sand where some other techniques are unsuitable.

  • Limited headroom, restricted access capability

 

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