Pore Pressures

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Introduction
Theoretical_Background
   Method of Slices
   Bishop
   Spencer
   Morgenstern & Price
Use of Limit Equilibrium
   Choice of Geometry
   Strengths & Pressures
   Long Term Problems
   Short Term Problems
   Summary
References
Input Instructions
   Geometry
   Boundary Forces
   Pore Pressures
   Strength Parameters
   Earthquake Loading
   Iteration Control
   M-P Method
   Convergence
Examples
   Example 1
   Example 2
   Example 3i
   Example 3ii
   Example 4

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Pore Pressures

Pore pressures may be computed from a specified phreatic surface or average pore pressure ratio, or specified at the base of each slice.

If the phreatic surface option is used, the user should specify points defining this surface. The points should be given in order of increasing x-coordinate and the first and last points should extend beyond the limits of each specified slip surface.

The pore pressures along a slip surface can be represented by an average pore pressure ratio r_u.

r_u = u/h

u is the pore water pressure,
is the unit weight of soil,
h is the depth of soil above the point being considered.

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