The focus of this research work is modelling time dependent swelling strain and pressure simultaneously in weak rock. Various swelling potential under different boundary conditions is considered. Free and semiconfined swelling strain and swelling pressure under oedometric condition are the most proposed tests for determination of the swelling potential of weak rock. In this paper, a modified swelling strain and pressure test is introduced using springs to provide deformable axial stiffness. The swelling strain and pressure of mudrock are modelled by artificial neural network for various swellable clay, carbonate, initial water content and different boundary stiffness, by using a combination of the proposed modified test along with the existing tests. This method correlates the results of laboratory tests with an acceptable accuracy. The proper operation of the developed model for predicting the time dependent swelling strain and pressure of mudrock under deformable and rigid axial boundaries is confirmed.
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