Hollow Bar Soil Nails

IBO rock bolt applied in Loose rock body
Anti-Corrosion IBO
Hollow Bar Soil Nails

Hollow Bar Soil Nails

Soil nailing is a method of earth reinforcement. It can be used as foundation repair or construction of soil slopes. Read SDA expert tips on how to repair a retaining wall – a foundation pit wall that can be used to retain earth after an excavation.


Advantages of soil nailing:

  1. Installation is practically free from vibration. Less noise and fewer traffic obstructions.
  2. The drill rigs can install soil nails at any angles. This is ideal for tight spaces engineering.
  3. Soil nail can be used for new construction, as temporary structures or remedial measure to treat unstable natural soil slopes.
  4. Soil Nailing is relatively rapid and uses typically fewer construction materials than ground anchor walls.


Action principle:

The shear strength of soil is very low, and its tensile strength almost can be ignored.

Soil-nailed wall technology is a kind of soil reinforcing method by placing with steel reinforcing bars and concrete rods.

In the comparison of cohesive soil slopes, a soil-nailed wall can avoid sudden collapse while loading. Soil nail walls not only postpone plastic deformation but also have obvious progressive deformation and cracking failure.


Compound Earth nail wall

Compound Earth nail wall

Prestressed Anchor and Soil Nail Wall

Prestressed Anchor and Soil Nail Wall


Self-drilling Hollow Bar Soil Nailing as Slope Sliding Anchor:

In general, the reinforcing bars are installed into a pre-drilled hole and then grouted into place. For self-drilling hollow bar soil nailing, the drilling and grouting are simultaneous.

If the soil strengthened systems are used as permanent structures, the ductility of hollow bar soil nails is also required. Infrastructure construction always emphasizes safety and stability.


Install self-drilling hollow bar soil nail:

Surface cleaning→Connect the hollow bar anchor to the drill rig→Drilling→Remove the drill pipe→Assemble the stop grouting plug→Injection

The use of Onton Self-drilling anchor system to restore a retaining wall/slope revetment is significantly less expensive than tearing down the wall and starting over. Self-drilling Soil Nailing method evolves from SDA rock bolting system in tunnel construction.