Results of wall stability analysis are shown on the Stability window through Calculate >
Stability menu, Stability button or 
toolbar. Main stability results including stability status,
pressure safety factor, sliding safety factor and base reaction status are shown in the Status
bar.
The following window will be shown.
External forces
1. Horizontal force (SH)
- The total (resultant) of horizontal forces applied on the wall.
Positive for rightward and negative for leftward.
2. Vertical force (SV)
- The total (resultant) of vertical forces applied on the wall. Positive for
downward and negative for upward.
3. Moment at overturning point (SMo) - The total (resultant) of overturning moments applied
on the wall. Positive for counterclockwise and negative for clockwise. The moments are
measured from the overturning point, ie a point at the lower left corner of the toe.
4. Moment at midbase (SMc) - The total (resultant) of overturning moments applied on the
wall measured from a point at mid of the base. Positive for counterclockwise and
negative for clockwise.
Excentricities
1. At overturning point (eo)
- The excentricity of the total (resultant) of forces applied on the
wall measured from the overturning point. Positive for rightward and negative for leftward.
The overturning point is at the lower left corner of the toe.
2. At midbase (ec)
- The excentricity of the total (resultant) of forces applied on the wall
measured from a point at mid of the base. Positive for rightward and negative for
leftward. The excentricity status with regard to the base is also indicated, whether it is in
the middle third, middle two-third or not.
Base pressures
1. Left (s1) - Left reaction pressure applied on the base. Positive for upward. Negative
pressure is not considered.
2. Right (s2) - Right reaction pressure applied on the base. Positive for upward. Negative
pressure is not considered.
3. Pressure width - Pressure width divided by base width, in percent.
4. Safety factor - Ultimate bearing capacity (qd) of base earth divided by
maximum pressure
(s1 or s2).
Sliding
1. Sliding force - Horizontal base reaction force as shearing force on the base. Positive for
rightward and negative for leftward.
2. Resisting force - The total available horizontal restraints, may consist of base friction and
cohesion, passive earth pressure on the toe, adjacent structure, anchor, pile, or passive
earth pressure on the shear key.
3. Safety factor - Resisting force divided by sliding force.
Warnings of instability of the wall will be noted.
Press 
button, "Enter" or "Esc" keyboard key to close the window.
See also:
