Various methods are available for in-situ evaluation of geotechnical properties.
Both types of tests have good applicability in estimating various soil properties, like moduli, strength, and liquefaction resistance. The results of penetration type soil tests represent the response of soil to an imposed deformation. Various theories have been developed to express analytical dependence between cone tip resistance and soil strength. It seems however that there is currently no satisfactory general solution for interpreting cone test results, therefore empirical correlations are still mainly used to derive soil properties. Numerous such correlations between the results of standard penetration and cone penetration tests and various soil properties have been developed.