METHOD TO TIGHTEN CABLES Russian patent published in 2015 - IPC E04G21/12 

FIELD: construction.

SUBSTANCE: method to tighten cables of concrete building structures includes placement of at least a bundle of cables into a structure tube. End parts of cables are fixed in a fastening element of the moved jack piston. Cables are tightened stage by stage with the help of a jack to achieve the design value of the tightening force corresponding to the stress-deformed condition of the structure. After achievement of the design value of the tightening force, the cables are maintained within at least three stages. Duration of each stage of maintenance makes at least 2 minutes, preferably from 4 to 7 minutes. Prior to start of each stage of maintenance they increase tightening of the cable to the design value of the tightening force. Power impact at the cable before the stages of maintenance is carried out during the time not exceeding the duration of the following stage of maintenance.

EFFECT: increased efficiency of technological process of tightening of cables and provision of required design value of tightening force of cables after their anchoring without use of complex process equipment.

8 cl, 1 dwg