Process for two-way tensioning of prestressed component

Abstract

The invention discloses a process for two-way tensioning of a prestressed component. The process comprises the following steps: (1) the prestressed component is left in a mold; and a tensioning anchortool is placed in front of the front end part of the mold by a certain distance; (2) retainer walls are arranged between the tensioning anchor tool and the mold, and are respectively arranged on twosides of a second reinforcement; (3) a first reinforcement penetrates through a through hole, and is connected with the second reinforcement through a connecting module; (4) a locking sleeve is sleeved into the first reinforcement, and is arranged in a through hole on the outer side of the tensioning anchor tool; and (5) the back end part of the mold and the front end part of the mold are the samein arrangement; a tensioner is used; and the front and back ends of the mold are tensioned at the same time. The fixed retainer wall and the tensioning anchor tool are arranged at two ends of the mold, and share stress of prestress, so that the mold dose not bear the prestress; and meanwhile, aiming at the condition of higher prestress, when the prestress is applied to the reinforcements, the prestress can be applied to two ends at the same time, and the prestress tensioning can be performed on two ends at the same time, so that one half of the time of the tensioning procedure can be saved.

Description

technical field [0001] The invention relates to a process method for bidirectional tensioning of prestressed components, which belongs to the technical field of civil engineering. Background technique [0002] At present, prestressed components have been widely used in highway bridges, railway bridges, and slope anti-skid fields. Prestressed concrete is to make up for the phenomenon of premature cracks in concrete. Before the component is used, the concrete is pre-stressed in advance, that is, in the tension area of ​​​​the concrete, the steel bar is stretched by artificial force, and the steel bar is used. The retraction force makes the concrete tensile area pre-stressed. This stored pre-stress, when the component bears the tensile force generated by the external load, first offsets the pre-stress in the concrete in the tensile area, and then increases with the load. The concrete is stretched, which limits the elongation of the concrete, delays or avoids the appearance of ...

AI Technical Summary

Problems solved by technology

[0003] The production of prefabricated components gradually realizes large-scale mass production, and the span of the mold increases. When the prestress is applied, when the prestress is large, it is easy to make the mold deform and the prestress application difficult. The traditional prestress Stretching on the mold is mostly done at one end of the mold, which also greatly limits the efficiency of production

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