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Drilled piling

Drilled piling

Drilled piling is ideal for installing foundations in challenging ground conditions, such as soils with cobbles, boulders and rock layers, and for founding piles deep into (forming rock sockets). A number of methods are available, depending on ground conditions and project requirements.

Benefits

  • Fast and accurate pile installation in challenging ground

Applications

  • Structural foundations for heavy loads
  • Installing piles through sands, gravels and boulders and rock
  • Ideal for forming rock sockets

Technique

Drilled piling uses down-the-hole hammers and drill bits to simultaneously install casing as the pile bore is drilled through the ground, with compressed air or water used to flush cuttings from the borehole. Where a pile is to be founded in bedrock, casing is advanced to the rockhead before the drilling tool is extended to create a rock socket. Concrete and reinforcement is installed in the completed borehole and casing is either removed or left in place to form the finished pile.

Van Elle have a unique offering providing cased piles including the rock socket in which the steel casing transfers the load and removes the need to concrete and reinforce the pile.

Capability

Van Elle offers a range of drilled piling methods, depending on ground conditions and foundation loads.

  • Rotary percussive for piles upto 762mm diameter
  • Duplex rotary percussive for piles up to 750mm with 813mm casing
  • Odex rotary percussive for piles up to 323mm in diameter
  • Elemex Super Jaws DTH (down the hole hammer) for permanently cased piles up to 1000mm diameter

Its Hütte and Klemm rigs use a number of different down-the-hole tools (including Duplex and Odex systems and Elemex hammers) to form piles of up to 900mm in diameter to depths of XXm.