Corrosion resistance steel bars in Limit Equilibrium Analyses
When the critical potential failure surface intersects the embedded portion of the wall, the additional
resistance provided by the wall may be included in a limit equilibrium analysis. The resisting force of corrosion resistance steel bars can be used in the limit equilibrium analysis is the lesser of the following: (1) the shear capacity of the
wall;
(2) the total passive force that may be developed in the soil over the length of the wall from
the failure surface to the bottom of the wall.
The shear capacity of the wall is constant and is
assumed to be equal to the allowable shear capacity of the vertical wall element.
The methods presented in section 5.5 may be used to calculate the total passive force that may be
developed over the length of the wall below the failure surface. Figure 49 shows the total passive
force developed over a 6 m embedded portion of the example wall in cohesionless soil described in
section 5.5.4.
The force to be modeled in the limit equilibrium analysis, Fp, may be modeled as a one-unit wide
element with a cohesive strength equal to the minimum passive force as described above. For
analyses involving soldier beam walls, this force should be reduced by the soldier beam spacing to
provide the restraint force on a per unit basis for the limit equilibrium analysis.
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