⁠Self Drilling Anchors - Soil Nails - Rock Bolts

Soil Nailing bolts usually involves the insertion of reinforcement bars (Hollow/solid) into the exposed slope followed by grouting, placement of a wire mesh and shotcreting before the testing and locking off of the nail through stressing jacks. Hollow soil nail bars can also be self-drilling thus acting as drilling rods with expendable drill bits. Soil nails are cost effective for stable soils where water pressure is not an issue and for excavations where space is a constraint.

They may be bonded along their entire length by cement grouting or anchored at various points at the base of the hole using chemical resin or a mechanical anchorage. Rock bolts transfer load from the unstable exterior, to the confined (and much stronger) interior of the rock mass.