Large bored piles

Versatile solution for deep foundations and excavation stabilisation

Large bored piles are ideal as deep foundation elements and for securing excavations. They can be produced as individual piles, in pile groups or as an overlapping pile wall with a sealing function. Large bored piles are fully cased using the gripper or rotary drilling method and, if the ground conditions permit, are produced as so-called auger cast concrete piles using the SOB method.

Implementation

The soil is either conveyed discontinuously using the grab and rotary drilling method with simultaneous support of the borehole by a casing or, in special cases, by bentonite suspension, or continuously using an endless auger (SOB). Once the cavity has been created, the reinforcement is installed using the gripper and rotary drilling method and concreted using the contractor method. With the SOB method, concreting is carried out directly via a core barrel while the continuous flight auger is being pulled and the reinforcement is then installed in the fresh concrete column.

Examinations

Integrity test (e.g. TNO, "low-strain method")
Static pile testing
Dynamic pile testing

Applications

Deep foundation in the entire construction area
Excavation support as an anchored or unanchored bored pile wall with overlapping, tangent or overlapping bored piles
Boreholes for drilled girder shoring - steel girders with timber, prefabricated or shotcrete infills