A two-way structural system for construction, comprising a base part (1) with a plurality of longitudinal channels (1.1) and a plurality of transverse channels (1.2) that are evenly 5 distributed, a stiffening part (2) with a plurality of holes (2.3) along the sheets (2.1, 2.2); wherein both parts (1 and 2) are made of FRP material, and wherein the stiffening part (2), in an operational position, is connected by resting on the base part (1) and fitting into the corresponding channels (1.1, 1.2), defining a cavity in the channels (1.1, 1.2) between both parts (1, 2) to be filled with fibre-reinforced concrete, the assembly forming an integral structure once the concrete has set, and both parts (1.1, 1.2) being configured as a self-supporting structure against the pouring of the concrete. A building method for constructing bridges, tunnels and underground works, with the two-way structural system.

A large-span corridor structure composed of arc-shaped cantilever trusses and stay cable supporting structures is provided, comprising cantilever trusses with arc-shaped facades, orthogonal connecting trusses at a corridor, connecting trusses at cantilever portions, corridor truss structures, and stay cable supporting structures; the cantilever trusses with arc-shaped facades are composed of two sets of ultra-long cantilever trusses with arc-shaped facades and triquetrous planes which are supported by ground and symmetrical, and each are set of ultra-long cantilever trusses with arc-shaped facades and triquetrous planes are formed of several ultra-long cantilever trusses with arc-shaped facades and triquetrous planes arranged in parallel at a certain distance. The beneficial effects of the present disclosure are: the large-span corridor structure composed of arc-shaped cantilever trusses and stay cable supporting structures provided serves the combination of the cantilever trusses with arc-shaped facades and the orthogonal truss at the corridor as the supporting truss core system, and the performance of lateral force resistance and torsion resistant of the overall structure can be enhanced by the connecting trusses at cantilever portions.

A large-span corridor structure composed of arc-shaped cantilever trusses and stay cable supporting structures is provided, comprising cantilever trusses with arc-shaped facades, orthogonal connecting trusses at a corridor, connecting trusses at cantilever portions, corridor truss structures, and stay cable supporting structures; the cantilever trusses with arc-shaped facades are composed of two sets of ultra-long cantilever trusses with arc-shaped facades and triquetrous planes which are supported by ground and symmetrical, and each are set of ultra-long cantilever trusses with arc-shaped facades and triquetrous planes are formed of several ultra-long cantilever trusses with arc-shaped facades and triquetrous planes arranged in parallel at a certain distance. The beneficial effects of the present disclosure are: the large-span corridor structure composed of arc-shaped cantilever trusses and stay cable supporting structures provided serves the combination of the cantilever trusses with arc-shaped facades and the orthogonal truss at the corridor as the supporting truss core system, and the performance of lateral force resistance and torsion resistant of the overall structure can be enhanced by the connecting trusses at cantilever portions.