Construction method of prestressing force fiber cloth reinforcing column adopting detachable tensioning anchorage device

Abstract

The invention discloses a construction method of a prestressing force fiber cloth reinforcing column adopting a detachable tensioning anchorage device. A prestressing force fiber cloth tensioning andanchoring device adopting a detachable tensioning anchorage device comprises two anchor plates, two clamping plates, two tensioning anchorage devices, two tensioning screw rods, two anchoring screw rods and a fiber cloth. The construction method comprises the following steps of determining a position to be reinforced, performing grinding, performing hole repairing, and coating an epoxy glue layer;then completing the connection of the fiber cloth with the tensioning anchorage devices, as well as the connection of the anchor plates with the clamping plates; wrapping the position to be reinforced and coated with the epoxy glue layer with the connected fiber cloth; screwing the tensioning screw rods to exert prestressing force on the fiber cloth; synchronously screwing the anchoring screw rods to maintain the prestressing force on the fiber cloth; unscrewing big bolts between the tensioning anchorage devices and the clamping plates; and discharging the tensioning anchorage devices and thetensioning screw rods, so that the reinforcing construction of a reinforced concrete pier can be realized. The construction method disclosed by the invention is good in reinforcing effects and convenient to operate; and the tensioning anchorage devices and the tensioning screw rods can be disassembled and repeatedly used, so that the cost is saved.

Description

technical field [0001] The invention belongs to the field of structural reinforcement such as bridge engineering and construction engineering, and particularly relates to a construction method of a prestressed fiber cloth reinforced column using a detachable tension anchor. Background technique [0002] Due to the local damage of the structure and the aging of materials, the original components of buildings and bridge piers cannot meet the requirements of bearing capacity, so they need to be reinforced. During reinforcement, the concrete is in a three-dimensional compression state by providing lateral restraint to the pier column, thereby improving the ultimate bearing capacity and ductility of the concrete. At present, the commonly used methods of prestressing and strengthening pier columns include prestressing steel hoops, steel strips, fiber cloth, steel strands, etc. Compared with traditional reinforcement materials, Fiber Reinforced Plastics (FRP) has the advantages of...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the tension anchor devices for concrete piers reinforced by prestressed fiber cloth are permanent, and the tension anchors cannot be reused, and the cost is high

And the anchorage is exposed on the surface of the pier column, which not only affects its durability but also has a certain impact on the appearance of the structure

In addition, in the commonly used tensioning anchors, the fiber cloth is wound on the clip or roller. When the fiber cloth is wide or the prestress is large, the clip or roller will bend and deform greatly during tension, making the prestress value of the fiber cloth less than expected

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