Fig. 15.87, shows the cross - section of railway tunnel. The radius OA of the circular path is 2 m. If AOB = 90^∘ , calculate the perimeter of the cross - section.
The Tunnel in cross section - Picture of Mersey Tunnels Tour, Liverpool - Tripadvisor
Tunnel Cross Section Studies
General Arrangement Showing typical cross Section of tunnel. - Cadbull
Typical cross section of tunnel | Download Scientific Diagram
Analytical solutions for collapse mechanisms in tunnels with arbitrary cross sections - ScienceDirect