METHOD FOR REINFORCEMENT OF MONOLITHIC AND PREFABRICATED REINFORCED CONCRETE STRUCTURES Russian patent published in 2020 - IPC E21B23/02 E04C5/01 

FIELD: construction.

SUBSTANCE: invention relates to automated and mechanized construction, especially when erecting high-reliability structures. Method for reinforcement of reinforced concrete structures with high-strength, corrosion-resistant fittings in the following zones: stretching, compression, shear and torsion - consists in the fact that reinforcement is made with screw alloyed reinforcement with reefs along helical spiral from alloyed chromium steel of corrosion-resistant grades: 40X Select, 15 CSND, 30XZMF, 30H2NMF. Protect the reinforcement surface from chrome plating. Pair of reinforcement frames is equipped in the zone of supports at the ends by anchor elements bent along a flat helical spiral from a rod with diameter not less than half of diameter of working reinforcement in the middle of span of the beam with alternation of vertical and inclined elements. Yokes are also made on flat continuous spiral. In the factory conditions weaving wallets - closed sleeves of design length - are weaved on a loom from high-strength steel wires. From the end, a pair of reinforcement frames is introduced into each hauberk, the pair of frames is moved to the opposite sides with the turn-buckles and the hauberk is pulled to the designed value, and in support zones frame is provided with pair of anchor tapered steel retainer pipes. Pair of reinforcing frames covered by woven chain-mail is placed into an external detachable steel formwork, and then the beam is concreated by an expanding fine-grained concrete with a centrifugal method. Beam is steamed, and at set with concrete of design strength it expands, holder of chain mail prevents expansion of concrete, squeezes it from all sides, concrete is self-strained, and its crack resistance sharply increases. Detachable casing is dismantled and the ready structure is sent to the construction site.

EFFECT: technical result is reduction of labour intensity of erection of structures, automation of their erection method and increase of their strength and reliability and reinforcement with textile fabric from cord.

1 cl, 4 dwg