Anchor bearing plate horn mouth cleaning method

Abstract

The invention provides an anchor bearing plate horn mouth cleaning method, belongs to the technical field of prestress construction, and is used for cleaning mortar in a horn mouth of a post-tensionedprestressing anchor bearing plate. A corrugated pipe extending to the horn mouth is arranged in the anchor bearing plate, and the mortar is deposited and solidified between the anchor bearing plate and the corrugated pipe. The method comprises the steps that the corrugated pipe is cut in the horn mouth of the anchor bearing plate so as to expose the mortar in the horn mouth; taking out the cut corrugated pipe; chiseling off the exposed mortar to expose the inner wall of the horn mouth; and cleaning away the chiseled mortar. A steel strand is ensured to linearly and smoothly penetrate into ananchorage device from a pre-stressed duct through the horn mouth without any dead bend jamming, so that subsequent normal tensioning and normal anchoring are ensured, and the problems of wire breakage, wire slipping, clamping piece staggering and the like caused by the fact that the steel strand is pressed into a dead bend are solved.

Description

technical field [0001] The invention relates to the technical field of prestressed construction, in particular to a method for cleaning the bell mouth of an anchor backing plate. Background technique [0002] The post-tensioning prestressing method used in the existing civil and architectural structures is more and more widely used. The level of the construction teams is uneven, and the technical personnel have insufficient research understanding of the subtle links. As a result, many prestressed structures often slip when they are prestressed. The phenomenon of broken wires and broken wires, and the misalignment of clips are also common. [0003] After research, it was found that the reason for the dislocation of the clips and the broken wires was that the bell mouth of the anchor backing plate was blocked by the mortar squeezed in from the gap between the anchor backing plate and the anchor plate and the bellows interface, so it was necessary to break the solidified mortar...

AI Technical Summary

Problems solved by technology

However, after more than ten days of maintenance on the components, the solidification strength of the mortar has reached more than 50MPa. Conventional impact drills, electric hammers, and manual chisel removal methods are all affected by the space. A slope is formed, and the steel strand cannot expand smoothly behind the horn after being penetrated, so it is bent, and the steel strand is prone to broken wires, slipped wires, clamping piece misalignment, abnormal elongation value, etc., which will affect the anchorage performance

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