Occasionally I am asked “How accurate is the CPT?” In short – generally it’s more accurate than most other in-situ and laboratory tests for a […]

Lunne et al (1997) suggested an approximate method to estimate soil permeability (hydraulic conductivity) from the CPT via the Soil Behavior Type (SBT) chart using […]

The shear wave velocity (Vs) is a very useful parameter since it links directly to the small strain shear stiffness of the soil (G0). Although […]

Traditionally the CPT has not been used extensively for the calculation of vertical settlements due to foundations loads. Partly this has been due to the […]

Boulanger and Idriss (2007, ASCE) recently presented an excellent summary for the evaluation of the cyclic softening in silts and clays. They correctly suggest that […]