Why Pile Geometry Can Dramatically Change Screw Pile Bearing Capacity

In this video, we demonstrate why pile geometry has a major influence on the bearing capacity of screw piles – and why torque measurements alone can never be used as documentation.

– Ø76T12: 2700 Nm → 50 kN

– Ø89T12: 3900 Nm → 72 kN

– Ø76SH276 (single helix): 3600 Nm → 110 kN

– Ø89SH289 (single helix): 4200 Nm → 127 kN

These results clearly show that there is no simple relationship between torque and bearing capacity.

Different geometries produce very different capacities, even when torque readings appear similar.

Therefore, it is essential to document all four critical parameters:

  • Soil conditions
  • Advancement ratio
  • Rotation speed
  • Pile geometry