Self-boring pressuremeter permeability measurements in Bothkennar clay

These measurements were carried out as part of an ongoing research collaboration between the Cambridge University Engineering Department (CUED) and Cambridge Insitu (CI). The project is centred on the development of a self-boring pressure-meter (SBP) system capable of measuring permeability as one of a number of fundamental soil properties from a single self-boring test.

The SBP of the Cambridge design was developed in the 1970s to carry out minimal disturbance in-situ tests on soil for obtaining high-quality in-situ strength, stiffness and horizontal stress parameters (Wroth & Hughes, 1972). The same device can also be used to obtain an...