Rapid load field tests interpreted with the new Guideline

Author(s):

Hölscher, Brassinga, van Tol, Middendorp, Revoort

Year:

2009

Language:

English

Where:

17th International Conference on Soil Mechanics & Geotechnical Engineering, Alexandria, Egypt

CONCLUSIONS:

Two instrumented driven piles are tested by both SLT and RLT. The measurements lead to the following conclusions:

  • The SLTs show a bearing capacity of 1120 kN respectively 1150 kN. The RLTs show a derived bearing capacity of > 1137 kN respectively 1158 kN.
  • The stiffness measured by RLT is practically useful.
  • The distribution between shaft and toe in a RLT differs from a SLT, presumably due to rate effects in the soft soil.
  • Excess pore water pressures are measured close to the pile toe.
  • The upm-method in the draft guideline gives information on stiffness and bearing capacity, for derivation of the full derived load-displacement diagram additional development is required.
  • The variable damping method must be developed further.

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