Mounting device for fitting vaulting panels and concrete reinforcing mesh in tunnels includes rock bolt with anchor fitting having grips for securing it to mesh

摘要

The anchor fitting (19) for securing the rock bolt (11) in the concrete layer (40) includes grips (29,30) for securing it to the concrete reinforcing mesh (38) before concrete is cast onto the mesh. The rock bolts are anchored in the tunnel wall and fasteners (14) screwed onto them are attached to the opposite sides of the vaulting panels (15) to the concrete layer.