Steel twisted-line tension-force measuring device

Abstract

The invention relates to a steel strand jacking force measuring device that includes strain meter, two inner sleeves, two outer sleeves and round steel. The two inner sleeves movably connect, and has round hole in center. The round steel is locating in the hole. Two ends of round steel have protuberance, whose diameter is larger than that of the hole. Strain gauge is stuck on round steel. The wire connects to strain gauge through the hole on inner sleeve. And the two ends of inner sleeve connect to the two ends of outer sleeve. Hole used for passing through steel strand is set in the center of sleeve. Cone cavity is set at the back of hole. And cutting off the steel stand, it could be connected to the cone clamping piece in cavity. The strain gage and steel strand is on the same axis. The invention has high accuracy, safety and reliability. It could realize monitoring the whole process of the pulling and using of the steel strand.

Description

technical field [0001] The invention relates to the measurement of the tensile force of steel strands in the anchoring section of the anchor cable, and the device can be widely used in engineering fields using prestressed steel strands for anchoring, such as bridges, water conservancy, slope protection, and buildings. Background technique [0002] The prestressing project is a complex concealed project, coupled with the constraints of inevitable factors such as pipe bending and steel strand twisting during the construction process, in order to test the tension of a single steel strand and its anchorage The distribution situation poses great difficulties. At present, the main method used: one method is to directly paste the strain gauge on the steel strand. The disadvantages of this approach are: first, it causes a certain degree of damage to the structure of the raw material; second, the most important aspect is that each bundle of steel strands is formed by intertwining mu...

AI Technical Summary

Problems solved by technology

The disadvantages of this approach are: first, it causes a certain degree of damage to the structure of the raw material; second, the most important aspect is that each bundle of steel strands is formed by intertwining multiple steel wires (for example, seven Ф5 steel wires are wound After forming a 15.24 steel strand), the outer surface is extremely irregular, and the deformation of each steel wire is inconsistent when the steel strand is pulled, so it is easy to cause the strain gauge to be loose and damaged and the force is uneven, which seriously affects the test accuracy

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