Our Role
Ayesa designed the temporary steelwork to support the creation of the cross-passage openings in the cast iron tunnel linings. The design provided support for the ring compression in the tunnel linings to allow for the rings to be removed around the opening, with a carefully defined tensioning sequence to ensure that no excessive loads were applied to each connection point. The temporary steelwork was successfully reused at each cross-passage location. Ayesa also carried out independent checking for the timber headings for each cross-passage.