Novel prestressed steel anchor bearing plate and processing method thereof

Abstract

The invention discloses a novel prestressed steel anchor bearing plate, which comprises a bottom plate, an extension cylinder and a grouting nozzle, wherein a circle of outer reinforcing protrusions are formed at the upper end of the extension cylinder in a lateral extrusion mode, and a circle of inner limiting grooves are formed in the outer reinforcing protrusions. The invention further discloses a processing method of the novel prestressed steel anchor bearing plate, which comprises the following steps: of cutting a steel pipe blank required by the extension cylinder and the grouting nozzle, cutting a grouting hole in the side wall of the lower end of the extension cylinder blank, and stamping the bottom plate blank at one time to form a mounting hole, an arc-shaped notch and a centralhole,placing the extension cylinder blank on an inner limiting groove forming machine to be subjected to lateral extrusion forming to obtain a circle of inner limiting grooves and a circle of outer reinforcing protrusionsformed at the upper end of the extension cylinder at the same time,and finally, splicing the extension cylinder, the grouting nozzle and the bottom plate and then conducting welding and forming. The problems that a gap exists between an existing extension cylinder and a corrugated pipe, eccentricity of the corrugated pipe and a steel strand in the corrugated pipe is caused, and slurry leakage is caused in the grouting operation are solved.

Description

technical field [0001] The invention relates to the technical field of anchor pads, in particular to a novel prestressed steel anchor pad and a processing method thereof. Background technique [0002] At present, the anchor pads used in prestressed bridges are mainly made of cast iron. The material of the cast iron anchor pads is mainly HT200 gray cast iron, and its strength is relatively low, only 200MPa. At the same time, the surface quality of cast iron parts is also relatively poor, not only there are a small amount of pores inside, but also some other impurities, which seriously reduce its performance. In addition, as a high-energy-consuming industry, the foundry industry not only has low production efficiency, but also seriously pollutes the environment while failing to meet market demand. To this end, we need to open up a new path to meet the broad needs of the market. [0003] In addition, since the anchor backing plate needs to be inserted into the bellows inside ...

AI Technical Summary

Problems solved by technology

[0003] In addition, since the anchor backing plate needs to be inserted into the bellows inside the extension tube when it is in use, and to ensure that the steel strands extend into the bellows, since the diameter of the bellows is often smaller than the diameter of the extension tube during construction, it cannot ensure that the extension tube There is a certain gap between the bellows and the tight fit connection, which will cause the problem of eccentricity of the bellows channel and the steel strands in it, which will cause uneven force on the steel strands during the drawing process, and even easily cause The steel strand is bent. In addition, the gap between the extension tube and the bellows will also cause grout leakage during the grouting operation, which increases the difficulty of later cleaning.

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