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The cone penetration test (CPT) is an in-situ testing method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. The cone penetration test (CPT) consists of pushing into the soil, at a sufficiently slow rate, a series of cylindrical rods with a cone at the base and measuring in a continuous manner or at selected depth intervals the penetration resistance on the cone and, if required total penetration resistance and/or the local side friction resistance on the friction sleeve. In addition, the pore-water pressure present at the interface between penetrometer tip and soil can be measured during penetration by means of a pressure sensor in the cone. This pore water pressure includes the pore water pressure increase or decrease due to compression and dilation of the saturated soil around the cone arising from the penetration of the cone and the push rods into the ground.