Abstract
A large number of probes, including dynamic penetrometers, are known for exploration and site invcsugution purposes. The Mackintosh probe is one of most widespread penetrometers in use in Saudi Arabia. It is light, portable and handy. The purpose of this paper is to present the capability and limitations of this probe. An equation has been derived to relate the Mackintosh M-value with the SPT N-value for cohesive soil. The values of the soil unconfined compressive strength and undrained shear strength can then be deduced with the knowledge of the M-value. For cohesionless soil, correlations were made to determine the relative density, friction angle and unit weight. However. due to the relatively low energy hammer, the Mackintosh probe is not a feasible method of e,ploring very dense cohesionless material.
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