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Hollow Bar Anchors
 Anchor can be used wherever a traditional ground anchor is being considered and provide a rapid, efficient method of installing tie back anchors in one visit to the drill hole.
All hollow anchor bars use the same installation technique. Diameter range from 30mm – 130mm and loads range from 100kN – 3000kN and only the drilling rigs get bigger. All anchors conform to the current British Standard (BS 8081:1989).
The installation technique allows the anchor to be drilled, installed and grouted at the same time, offering benefits to ground improvement, type of machinery used for installation and dramatic increases in productivity on site.
 The hollow bar anchor system is ideal for Tie Back Anchors; Ground Anchors, Grouted Anchors, Injection Grouting, Grout Blankets, Soil Nailing, Ground Stabilsation and Rock Coring.
Advantages:
- Three (3) times greater productivity than conventional systems.
- Fast progress of construction due to drillling, anchor installation and grouting in a single operation
- No casing is required in collapsing ground conditions.
- Neither separate anchor installation nor removal of casing and drill rods are necessary
- Similar installation methods for all ground conditions
- The hollow core not only serves for flushing during drilling, but also for grouting the anchors
- Grout injection technique continually scours and flushes the sides of the drill hole, enhancing mechanical connection to
the soil.
- Anchor bars are made from a high quality, high yield, low carbon steel, which does not suffer from hydrogen
embrittlement or stress corrosion cracking.
- The grout body provides simple, permanent corrosion protection.
- Very low creep characteristics of the bar obviate the need for re-stressing.
- Flexibility in length due to the utilization of couplers
- Can be extended by couplings on site if ground conditions do not match the S.I. information.
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