This technology has been developed as a driving assistance for press-in works at hard ground conditions such as sandy gravel, boulders and rocks without losing superiorities of Press-in Method. With the GIKEN's original concept, “Coring Theory”, an augering attachment, which is simultaneously operated with press-in machine, drills hard ground layer to prevent generating pressure bulb at pile toe, and pile is pressed-in while auger is pulled up.

Use of the integral augering based on the superior Press-in Principle enables all the advantages of the Press-in method to be adopted to pile installation in difficult subsoil conditions. Therefore there is no danger of overturning of the machines, nor necessity of wide right of way or temporary staging. Moreover, this system achieves minimum disturbance to surrounding subsoil with limited soil removals. Thus the associated environmental impact is minimal during the whole piling operation.

Procedure of “Coring Press-in”

Crushing boulders by wedge effect