Phicometer

A Phicometer is a ground-mechanical test machine with the aid of the in-situ - shear strength in the borehole can be detected.

It consists of a probe that is inserted into a borehole (62–65 mm). Using a hydraulically applied radial pressure, the probe is interlocked with the wall of the borehole, i.e. the ground, and then pulled upwards. This gives a tensile force T from which friction and cohesion are overcome, depending on the radial pressure. Analogous to the frame shear test , a value pair consisting of shear stress and normal stress is obtained . With the help of a series of experiments, Phicometer friction angle and cohesion can then be determined. ${\displaystyle \phi _{i}}$ ${\displaystyle c_{i}}$

literature

• Rolf Katzenbach , Christian Gutberlet, Stefan Wachter: The Phicometer shear test as a new method for in-situ determination of shear strength . In: Der Bauingenieur , Vol. 81 (2006), No. 9, pp. 406-411, ISSN  0005-6650