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GEO5

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Verification - Safety Factor

Program evaluates normal and shear force in the footing bottom and then verifies the wall against overturning and sliding. For walls with a flat footing bottom and specified jump it is possible to account for the wall jump either in the form of pressure acting on the front face or by considering a wall with an inclined footing bottom.

Check for overturning stability:

where:

Movr

-

overturning moment

Mres

-

resisting moment

SFo

-

safety factor for overturning

Check for slip:

where:

N

-

normal force acting in the footing bottom

φd

-

design angle of internal friction of soil

cd

-

design cohesion of soil

d

-

width of wall heel

e

-

eccentricity

H

-

shear force acting in the footing bottom

Fres

-

resisting force (from georeinforcement and mesh overlap)

SFs

-

safety factor foe sliding resistance

µ

-

reduction coefficient of contact base - soil

where eccentricity e:

where:

Movr

-

overturning moment

Mres

-

resisting moment

N

-

normal force acting in the footing bottom

d

-

width of wall heel

Horizontal components of forces are included in the shear force and overturning moment, vertical components of forces are included in the normal force and resisting moment. The resisting forces and moments also include horizontal forces from georeinforcements and overlapping meshes.