Ground Engineering - Tunneling & Mining - GEOTEC™ Steel Combination Bolt

Immediate and permanent rock bolting solution

GEOTEC™ Steel Combination Bolt is suitable for the most stringent requirements. A mechanical bolt combined with a corrugated pipe and a double grout layer all along tendon to provide both high bonding and protection against corrosion (similar to Double Corrosion Protection / DCP).

It is initially installed for immediate support by the use of an expansion shell, to be fully grouted at a later stage allowing it to be classified as permanent application.

• Available for boreholes from 45mm to 68mm.
• Full range of expansion shells available to adapt to a variety of ground conditions.
• Dual anchorage: punctual + full encapsulation.
• Difference types of coating against corrosive environment.

Shell range : Available for every ground conditions.

Various applications : Such as roadways, hydropower and underground oil/gas storage, sub-sea and sewer tunnels

Instant support : Once expanded, the shell and rod provide a full anchor, letting you continue the excavation right away.

Cut-able support is mostly used in the longitudinal direction of the tunnel (portal, face) when temporary stabilization is required before moving to the next phase. Also, Mechanized Tunneling is becoming standard in urban areas, especially for underground metro projects. This modern technique is calling for new kind of systems, in particular cut-able reinforcement bars for concrete structures (like Soft-Eyes in D-walls) and cut-able ground anchors.

When building a tunnel by drill & blast or conventional mining, the roof and walls need to be supported. Rock-bolts are the first type of support installed, before any other kind of mesh or lining is applied. Depending on the construction sequence and technology, both temporary and permanent bolts can be offered.

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