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Full displacement drilling

A single-pass drilling method

    
        

Full displacement drilling is a modified version of continuous flight auger drilling and is exclusively used for producing cast-in-place piles. The surrounding soil is only displaced and almost no drill cuttings are conveyed to the surface. Instead of a continuous auger a smooth casing is used. At the lower end the casing is fitted with a so-called displacement body.

  • Leader

  • Rotary drive

  • Leader top for auxiliary rope

  • Kelly extension

  • Drive tube

  • Displacer

        
    
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Video full displacement drilling

The video shows various Liebherr carrier machines working with full displacement tools.

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