GRP Bolts

Fields of Application

Mechanical excavation – TBM’s, roadheaders, and continuous miners
Cuttable bolt system - portals and temporary rock reinforcement to be removed by excavators
Face support
Ground stabilization in special foundations
Injection lance for DYWI^® Inject Systems

Basic Concept

Glass-reinforced plastic (GRP) bolts are used as an alternative to conventional ground control elements made of steel. Thanks to the rapid development of production technologies and a higher amount of mechanical excavation, GRP systems have gained importance in Tunneling around the world.

Fields of application of GRP bolts range from cuttable bolts for mechanical excavations to injection lances or forepoling.

DSI Underground provides a diversified portfolio of GRP systems for various Underground applications which is completed by longtime experience in the production and application of GRP bolts.

Main Advantages

Lightweight system ensures an easy handling and installation
High tensile load-bearing capacity
Tough and durable, yet easy to cut using mechanical excavators or shearers
Enhanced corrosion resistance
Anti-static components – EX-proof system
Tough and resistant threadform adjusted to the demands in the construction industry
Type CS: Fully threaded solid GRP bar
Type CH: Fully threaded hollow bar
Type CR: Fully threaded self-drilling hollow bar