Improvements in the construction of coating plates for tunnels. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the construction of lining plates for tunnels, characterized in that a generally rectangular sheet is curved and arched along its longitudinal axis, said sheet having in cross section a neutral axis, and an anterior marginal rim fastening and a rear marginal fastening flange, the first being disposed on the outward side with respect to said neutral axis and the second on the inward side with respect to this axis. (Machine-translation by Google Translate, not legally binding)