Phase 2
Forces on the soil layer
As discussed before the cohesion, adhesion, inertial forces and water tension
can be neglected. For the figure above, a force balance can be calculated.
The shear force and the normal force are related
according:
and
Where:
Internal friction angle of the sand
External friction angle fluke/sand
The grain forces will be:
and
The weight of the soil can be given as a force
according:
Where:
Length of the fluke in the sand
Density of the in situ sand
Angle of the fluke in the sand
Angle of the shear zone
Horizontal equilibrium of forces:
Vertical equilibrium of forces:
Forces on the fluke
The force
The following
forces are acting on the fluke blade:
The force Fp can
be neglected as discussed before.