Can pore pressures be simulated by input of a grid of pore pressures?

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Can pore pressures be simulated by input of a grid of pore pressures?

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Pore water pressure input from a pore pressure grid is not included at present for the following reasons: • A pore pressure grid assumes that the pressure at the base of the slice is equivalent to the pressure due to the equipotential line, and this pressure is slightly less than the pressure due to the vertical distance from the base of the slice to the phreatic surface. However, this loss in head is actually dissipated by causing a ‘drag’ on the material particles in the direction of the seepage, which is usually in the direction of the failure. Therefore, in practice the ‘real’ pore water pressure is probably better simulated by using a standing head, than by using an equipotential line. An equipotential line may, in fact, be too optimistic. • GALENA is a complete, standalone package, and does not require any other seepage packages to be run before being able to run stability analyses. • Many geotechnical, mining and civil engineers need to analyse a large number of options rapidly.

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