DYWIDAG GFRP Rock Bolt

Cuttable rock bolt for use in urban applications or adjacent to tunnels.

• Ground Support

GFRP Rock Bolts are used as an alternative to conventional ground control elements made of steel. Thanks to their excellent corrosion resistance, GFRP systems have gained importance in underground construction around the world. These bolts are non-conductive, lightweight, easy to install, durable, are dimensionally stable under thermal loading, have an anti-static rating, and can also be cut without creating sparks.

The GFRP Rock Bots are made of a composite material composed of high-performance resins and high-strength glass fiber. This is supplemented with an array of various additives, which are then processed using very specific technology for different applications.

• Lightweight system ensures an easy application in challenging conditions

• High tensile load-bearing capacity for demanding applications

• Tough, durable, and safe to cut using mechanical excavators or shearers to minimize impact on subsequent works

• Enhanced corrosion resistance and anti-static components for improved longevity compared to steel

• Continuous rope thread allows for cutting to required length for easy on-site length adjustment

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Main standards of steel nuances

Asia: Solid bar available in 20mm, 25mm, 32mm and 38mm diameters with minimum ultimate grade ranging [900MPa-1000MPa] - Hollow bar available  with minimum ultimate grade of 1000MPa.

Accessories

3 bar options: fully threaded solid GFRP bar, fully threaded GFRP hollow bar, fully threaded GFRP self-drilling hollow bar with single use drill bits

• Superior design life achieved with steel components galvanization

• Wide range of plates and nuts available, in GFRP or in steel when higher loads are requested

• Steel couplers

Energy

Tunnels