The GFRP BAR and Stirrups are successfully used to replace the traditional reinforcement bar within concrete structures in temporary tunnelling works (D-walls, retaining walls, piles and the like) e.g. within the tunnel breakthrough, the so-called ‘soft-eye’.
Used in tunnelling works, our GFRP CRG fibreglass bolt is equipped with a steel head for post-tensioning and is used in rock bolting, soil nailing and ground anchors. It is made of a reinforced polyester resin matrix, together with a unidirectional glass fibre (GFRP type E-Glass) continous thread profile. The thread process does not affect the glass fibre integrity, with significant enhancement of both fiction effect (pull-out), and overall tensile strength capacity.
GFRP Pipes are used for ground reinforcement in tunnelling works, wherever significant enhancement of the ground characteristics are required, e.g. within the tunnel face ahead of the excavation, the so-called ‘core consolidation’.
The P.E.R. Ground System (Pressurizing Element for Reinforcement of the Ground) series has been engineered to provide tunnelling clients with cost efficient ground improvement in difficult and adverse conditions. The system is fully customisable and can solve multiple tasks simultaneously; drainage, reinforcement and soil consolidation. It is used in loose, swelling or ravelling ground and also where stringent requirements in underground water control are imposed.
Our E-EXBOLT is a rock bolt for use in (but not limited to):
– Mining applications such as hanging wall and roof bolting
– Tunnelling applications such as radial systematic bolting
– Rock slope stabilisation
It is made of a welded metallic tube, longitudinally crimped (folded in on itself) and sealed at one end. The bolt is expanded inside a pre-drilled borehole using a high pressure water flow from a pump. The installation process is easy and very similar to other rock bolts. This makes E-EXBOLT readily usable by all operators.