Anchor bearing plate device used for measuring anchoring force of single steel cable and measuring method

Abstract

The invention belongs to the pre-stress technology field, to be specific, relates to an anchor bearing plate device used for measuring anchoring force of a single steel cable and a measuring method. The device comprises an anchor disc 1 and a clamping sheet 7. The clamping sheet 7 is used for clamping the single steel cable, and the anchor disc 1 is provided with a plurality of conical anchor holes2. The shape of the clamping sheet 7 is cooperated with the shape of the anchor hole 2, and is disposed in the anchor hole2. The end surface of the anchor disc 1 is provided with a lead groove 4 and a strain gauge groove 3, which is concentric to the anchor hole 2. One end of the lead groove 4 is communicated with the strain gauge groove 3, and the other end of the lead groove 4 is extended to the side surface of the anchor disc 1. A strain gauge 5 is disposed in the strain gauge groove 3, and a lead 6 is disposed in the lead groove 4. The strain gauge 5 is connected with the lead 6, and the other end of the lead 6 is extended out of the side surface of the anchor disc 1. By using the above mentioned device, the measuring axial pressure can be converted into the measuring lateral pressure, and the anchoring force of each steel cable can be measured accurately.

Description

【Technical Field】 [0001] The invention belongs to the technical field of prestress, and specifically relates to an anchor pad device and a measuring method for measuring the anchoring force of a single steel beam. 【Background technique】 [0002] Reinforced anchor plate is an anchoring device used in prestressed concrete. It is an anchoring tool to maintain the tension of the prestressed tendons and transfer it to the interior of the concrete. The current pre-stressed steel anchors can only provide anchoring and force transmission functions, while the tensioning jack can only read the tension control force when the steel is tensioned, and the anchoring force after the steel retraction, anchor deformation, and concrete deformation cannot be obtained. . In addition, multiple steel bundles are often used for simultaneous tensioning during stretching, so the total tension of multiple steel bundles can only be measured, and the anchoring force of a single steel bundle cannot be obtain...

AI Technical Summary

Problems solved by technology

The current prestressed steel anchors can only provide anchoring and force transmission functions. When tensioning steel bars, only the tension control force can be read from the tensioning jack, and the anchoring force after steel bar retraction, anchor deformation, and concrete deformation cannot be obtained.

And when stretching, multiple steel beams are usually stretched at the same time, so only the total tension force of multiple steel beams can be measured, and the anchoring force of a single steel beam cannot be obtained

Therefore, there may be unbalanced stress distribution among the steel beams, some steel beams have too little stress, some steel beams have too much stress, or even broken wires and other dangerous situations, endangering the engineering structure and personal safety.

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