United Drillers

09. Soil nailing & guniting

soil nailing & guniting Soil nailing is a technique in which soil slopes, excavations or retaining walls are reinforced by the insertion of relatively slender elements - normally steel reinforcing bars. The bars are usually installed into a pre-drilled hole and then grouted into place or drilled and grouted simultaneously. They are usually installed untensioned at a slight downward inclination. A rigid or flexible facing (often pneumatically applied concrete otherwise known as shotcrete) or isolated soil nail heads may be used at the surface.

Gunite is a commonly used terms for substances applied via pressure hoses. Gunite is mortar or (usually) concrete conveyed through a hose and pneumatically projected at high velocity onto a surface. Gunite undergoes placement and compaction at the same time due to the force with which it is projected from the nozzle. It can be imparted onto any type or shape of surface, including vertical or overhead areas.

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