Underground car park or station construction system - uses adjustable frames for sequential construction of walls, floors and roofing

摘要

The system for constructing an underground railway station or car park can begin by excavating a chamber between two pilot tunnels and a central tunnel which can be used for escalators or access roads. A framework is installed inside the chamber as it is formed, with telescopic cylinders (11) supporting roof members (6) hinged together, and an intermediate working platform (8). In a further stage, a lower chamber is formed below the first using further similar frameworks. Simultaneously with these operations, the walls can be installed in stages, beginning at the junctions with the pilot tunnels, floors (19) made up of interlocking segments (18) installed and supporting columns (15) erected. Side parts of the lower chamber can be left to form a stepped support for the flooring.