Positioning and fixing system for panels used to form tunnel casings by pouring concrete between them and tunnel wall comprises hydraulic cylinders linked by connecting rods to panels

摘要

The positioning and fixing system for panels (24, 25) used to form tunnel casings by pouring concrete between them and the tunnel wall comprises hydraulic cylinders (101, 103). These are linked by connecting rods (105, 107) to the panels. An independent claim is included for casing machines incorporating the positioning and fixing system.