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Internal stability of a Gabion Wall - Limit States

Reduced parameters of the gabion material, which depend on the coefficients set in the "Wall analysis" tab, are used in the verification analysis.

1) Check for overturning stability:

where:

Movr

-

overturning moment

Mres

-

resisting moment

2) Check for slip:

where:

N

-

normal force

φd

-

design angle of internal friction of soil

cd

-

design cohesion of the soil

d

-

width of block

e

-

eccentricity

γs

-

reduction coefficient of sliding resistance

H

-

shear force

Fres

-

resisting force (from georeinforcement and mesh overlap)

µ

-

reduction coefficient

3) Check for bearing capacity with respect to the lateral pressure:

where:

T

-

average value of the pressure acting on the face of the bottom block

S

-

force per one running meter of the joint

Su

-

joint bearing capacity (for input, use the "Material" frame)

b

-

width = 1m of structure width

h

-

height of the block

Dtotal

-

overall width of meshes loaded in compression T

4) Check for bearing capacityof joint between blocks:

where:

Nd

-

tensile force per one running meter of the upper joint of the bottom block

Nu

-

strength of the mesh (for input, use the frame "Material")

Qtr

-

shear force transmitted by friction and cohesion between the blocks

γt

-

reduction coefficient of friction between the blocks (for input, use the "Wall analysis")

h

height of the block

Dtotal

overall width of meshes loaded in compression T

Dupp

width of the upper mesh between blocks loaded in tension

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