Cone Penetration Testing (CPTu)
A Cone Penetration Test (CPTu) is a method used to determine the geotechnical properties of subsoil layers and soil stratigraphy in situ. It is performed by pushing cylindrical steel probe (piezo-cone) into the ground at a constant rate of 20 mm/s. While pushing, the test provides continuous profiling of stratigraphy and a number of soil parameters are measured, tip resistance (qc), friction on the cone sleeve (fs) and pore water pressure (u2). The data is uploaded and displayed in real-time in graphical format on a laptop computer.