A cleaning method for bell mouth of anchor backing plate

Abstract

The invention provides a method for cleaning the bell mouth of an anchor backing plate, which belongs to the technical field of prestressed construction and is used for cleaning the mortar in the bell mouth of a post-tensioned prestressed anchor backing plate. A corrugated pipe with a bell mouth, the mortar is deposited and solidified between the anchor backing plate and the bellows, the method includes: cutting the bellows in the bell mouth of the anchor backing plate to expose the bell the mortar in the bell mouth; take out the cut bellows; chisel the exposed mortar to expose the inner wall of the bell mouth; clean the chiseled mortar. Guarantee the smooth linearity of the steel strand from the prestressed channel through the bell mouth into the anchorage, and no dead bend jamming will occur, so as to ensure the subsequent normal tension and normal anchoring, and solve the problem caused by the steel strand being pressed into a dead bend Broken wires, slipped wires, wrong clips and other problems.

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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