Mounting system for arch panels in tunnels, comprises rows of rock bolts secured by fasteners to panel mounting rails

摘要

Rows of rock bolts extending in the tunnel cross-direction are secured to the tunnel wall and are used to secure curved mounting rails also extending in the tunnel cross-direction. The rails have a T-shaped profile and are used to secure the panels. The rails are held in place by fasteners attached to the ends of the bolts. At least one clamping plate presses against the outer edge of a protruding web part of the rail.