THE PORE PRESSURE – STRAIN RELATIONSHIP OF NORMALLY CONSOLIDATED UNDISTURBED CLAYS: PART I. THEORETICAL CONSIDERATIONS

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Abstract
This paper presents a critical review of the current theories of predicting pore pressures in saturated clays. These theories are generalized and examined and their limitations discussed. It is shown mathematically that the pore pressure induced by shear may be expressed as a sole function of major principal strain, and this approach eliminates the anomalies inherent in the "stress theories" for pore pressure. A hypothesis is also developed to provide a possible mechanism of pore pressure set up in undisturbed normally-consolidated clays.