J.Monnet, D. Mahmutovic, L. Boutonnier (2016) Membrane correction for pressuremeter test
The pressuremeter standards allows only two corrections: on the dilatation of the equipment; on the membrane rigidity. It assumes that the pressure applied into the probe is equal to the reaction pressure of the soil at the borehole wall. It neglects the effect of the thickness of the membrane and its defor-mation shape. This paper takes into account the effect of thickness of the membrane and its balloon shaped deformation with new corrections applied on the pressuremeter measurements. A theoretical correction is proposed and check by the results of a finite element calculation which takes into account the presence of two type of membrane: one in free ends for probe G, one with embedded ends for
slotted tube probe. With these corrections, the pressuremeter test can be used as a shearing test able to measure the shearing elastic and plas-tic characteristics of the soil.