SEDL / STP / STP1087-EB / STP17238S

Pore Pressure Response to Probe Insertion and Thermal Gradient: ISIMU-II

Riggins, M
Assistant professor, Colorado School of Mines, Golden, CO

Valent, PJ
Head, Naval Ocean Research and Development Activity, NSTL, MS

Pages: 11    Published: Jan 1990

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Abstract

The ISIMU-II experiment was designed to assess the pore pressure response during piezometer and heater probe insertion and the subsequent excess pore pressure behavior as a result of a thermal field within the sediment. The dissipation of the excess pore pressures generated during probe insertion was predicted using an exponentially decreasing function which incorporates a smear factor to account for sediment remolding next to the piezometer wall. An analytical model to describe concurrently the rise in excess pore pressures as a result of sediment heating and the radial dissipation of the resulting pore pressures into the surrounding sediment is described and applied to the experimental data.