PRESTRESSED FERROCONCRETE CONSTRUCTIONS Russian patent published in 1999 - IPC

FIELD: building industry, possibly manufacture or erection of prestressed ferroconcrete constructions with high demands for preventing cracking, especially operating in conditions of aggressive media, with high effort parameters of stressed reinforcement of beams, span structures of bridges, tunnels, reservoirs, reactor vessels, protective covers of nuclear reactors and so on. SUBSTANCE: uniform tension of rope strands is provided along the whole cross section of curvilinear passages. Jamming of slightly curved rope strands by means of sharply bent rope strands is prevented. When rope strands are pulled along passage of construction perforated spacing discs are used. Such discs are secured preliminarily to towing cable. Rope strands are passed through openings of discs. Supporting rollers are mounted on side surface of discs. EFFECT: improved design. 4 dwg