Table 2.

The applicability and usefulness of some in situ penetrometer or direct push tests (based on Robertson & Cabal 2015)

In situ testSoil typeProfileIn situ static pore pressureOverconsolidation ratioRelative densityPeak friction angleUndrained shear strengthYoung's modulusStress–strain relationshipCompression indexPermeabilityCoefficient of consolidationHard rock typeSoft rock typeGravelSandSilt–clayPeat–organic
SPTBBDCBCCCDDDDDCBABB
CPTBADBBBBBCCCDDBBAAA
CPTuAAABABABCBAADBBAAA
SCPTuAAAAABAABBAADBBAAA
DMTBBBBCBBBCBCBDCCAAA
SDMTBBBABBBABBCBDCCAAA

Applicability of test: A, high; B, moderate; C, low; D, none. Type of test: SPT, standard penetration test; CPT, cone penetration test; CPTu, piezocone penetration test; SCPTu, seismic cone penetration test; DMT, flat plate dilatometer; SDMT, seismic dilatometer.