Sammendrag
In anisotropic materials Skempton's B parameter becomes a second order tensor. It is well established from laboratory experiments that the Skempton B tensor may deviate significantly from isotropy, which will influence the pore pressure response. The anisotropy of B in essence results from the anisotropy of the rock formation, and as a result the effects of the tensor Skempton cannot be considered without taking the underlying anisotropy into account. In this paper we use an implementation of Amadei's (1983) solution of the stress field around the borehole in an anisotropic formation to study the Skempton-induced pore pressure. Examples are shown where the anisotropic contribution dominates completely over the isotropic part, and where anisotropy nearly nullifies the isotropic contribution