Stability of Slopes

Question

How soil nails improve stability of slopes? Explain?

Answer 1

Normally, it is expected that with the introduction of soil nails to slopes, this new combination possesses the higher shear strength has compared to the original soils. In context of Rankine’s active state, soil nailing provides the horizontal restraint to guard against the active failure.

Furthermore, when the soil inside the failure zone are developed, block failure which is based on the Coulomb is still practical. By installation of soil nails, it defers the original failure planes of slopes to a greater extent inside the slope, which is normally of more stability condition with less ingress of surface rainwater.