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Anchorage of Rock Slope

Two types of anchors can be defined when running the slope stability analysis on a plane slip surface:

Active

An active anchor is represented by a pre-stressed anchor, for which the anchor forces are activated before the sliding of a rock block takes place. The normal force increases the normal stress on a slip surface and as such also the resisting forces; the tangent component of the normal force is either added to or subtracted from the shear (active) forces.

Passive

A passive anchor is activated by sliding of a rock block (i.e. not pre-stressed anchors). The normal force increases the normal stress on a slip surface and as such also the resisting forces; the tangent component of the normal force is added to the resisting forces.

Resolution of anchor force