material transport carts for tunnel construction 20 tons
21-08-27
How tunnel is made – material, history,Custom, machine, History, Raw Materials
Excess material is passed back through the shield on a convey or belt, loaded into carts, and hauled out of the tunnel. When workers have dug out material in front of the shield as far as the top extends, jacks at the rear of the shield are braced against the most recently installed section of tunnel lining.
Construction Planning, Equipment, CHAPTER TRUCKS AND
Section 20 CAT Handbook CHAPTER 10. TRUCKS AND HA...