IBI - Self-drilling Anchor

Field of application

 
IBI Self-drilling Anchors are successfully used for reinforcement ahead of the tunnel face in terms of spiles or spile umbrella support, additional reinforcement, and supplementary anchor works. Main applications are:

• Tunneling and Mining
  • Reinforcement ahead of the face
  • Reinforcement of large underground structures, widening of tunnel cross-sections
  • Foot piles
  • Tunnel portals, trenches, and cut and cover areas

• Special foundations
  • Rehabilitation and rapid protection of unstable slopes
  • Buoyancy control of foundations - grouted piles

System Components

IBI-anchor plate

	IBI - nut with convex seat, including threaded piece
	IBI - anchor bar with left-handed thread
	IBI - coupling with continuous outside-thread and middle stop
	IBI - post-grouting coupling with continuous outside-thread and middle stop plus rubber sleeve for multiple injections

IBI - drill bits

IBI - drill bits (including threaded piece) are available by default with carbide inserts. Drill bits in different designs and diameters are available on request.

	Arc-shaped drill bit with 3 buttons R32/R38, Ø 76 mm
	Button bit R32, Ø 51 mm
	Button bit R32/R38, Ø 76 mm
	Arc-shaped drill bit with 3 buttons R38, Ø 90 mm

 System Description IBI - Self-drilling Anchor

• Hollow bar anchor with continuous cold-rolled thread
• Application as injection anchor without casing, especially for non-stable boreholes
• Self-drilling installation, utilization of the anchor bar as drill rod with a single-use drill bit
• Easy extension of the anchor bars by couplings
• Grouting or development of the grout body either simultaneously with drilling by using a rotary injection adapter or afterwards
• Assembly of the anchor head with the anchor plate and the nut; stressing and locking of the anchor bar with a torque wrench or hydraulic jack after the grout has cured
• IBI - Self-drilling Anchor with post injection technique: subsequent re-injections with IBI - post-grouting couplings
• Compatible flow-pressure meter available

Prime advantages of the IBI - Self-drilling Anchor

• Easy and similar operating principle for different rock mass and soil conditions
• Drilling, installation, and injection of the IBI anchor in one single operational step
• Systematic re-injections with IBI - post-grouting couplings ensure optimum ground improvement
• No pre-drilling of a borehole by using a casing tube and extension rods with subsequent anchor installation necessary
• Minor space requirement for anchor installation
• Optimized machinery and manpower requirements
• Basic dimensioning of the required anchoring forces by choosing the appropriate anchor type
• Functional adjustment of the required anchor lengths by using couplings
• Optimum bonding of the profiled anchor rod and the grout
• Adjustment of the IBI - drill bit design and diameter to different rock mass and ground conditions
• Controlled and documented injection or development of the grout body by usage of the AT - Flow-Pressure Meter

Specifications

Injection Equipment

AT - RIA Rotary-Injection-Adapter	AT - Flow-Pressure Meter	AT - Mortar-Mixing pumps: M400 EASY / M400 NT
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