Construction method of prestressing force stretching high strength composite material and anchoring

Abstract

A prestress stretch and anchor method for high intensity compound material belongs to the construction of compound material reinforcement or civil engineering structure strengthening especially relates to the technical field of high intensity compound material prestress stretch and anchor to be the simple technology, convenient operation, high reliability, good engineering result, strong adaptability to the engineering structure with light weight, small size, rigid, strong carriage, strong ability of crossover, and widely used in bridge, large crossover industrial workhouses, sheds, docks, underground railways and part mechanical industries such as large scale hoist and transport equipments, ships and lorries.

Description

1. Technical field [0001] The invention belongs to a construction method for high-strength composite materials to reinforce or reinforce civil engineering structures, and particularly relates to the technical field of high-strength composite material prestressed stretching and anchoring. 2. Background technology [0002] With the development of science and technology and the progress of society, people have put forward new requirements for civil engineering, such as requiring light structure, good rigidity, large spanning capacity, and strong bearing capacity. High-strength composite materials (such as carbon fiber reinforced plastics, polymer fiber reinforced plastics, glass fiber reinforced plastics, etc.) have the characteristics of light weight, high strength, fatigue resistance, and corrosion resistance. , wood structure, concrete structure, etc.], but due to the poor shear performance of composite materials, the existing methods cannot be used for prestressed tension, ...

AI Technical Summary

Problems solved by technology

High-strength composite materials (such as carbon fiber reinforced plastics, polymer fiber reinforced plastics, glass fiber reinforced plastics, etc.) have the characteristics of light weight, high strength, fatigue resistance, and corrosion resistance. , wood structure, concrete structure, etc.], but due to the poor shear performance of composite materials, the existing methods cannot be used for prestressed tension, connection and anchorage, so the excellent performance of high-strength composite materials cannot be fully utilized.

Although it is also possible to make a composite material into a stranded wire, and then coat a soft alloy within a certain length at both ends of the composite material stranded wire to improve its shear resistance during tension and anchorage, but this technology is very complicated and costly. The reliability of tensioning and anchoring is poor, and it is inconvenient to be widely used in engineering structures

The patent application number is 99120617.7 "Carbon Fiber Cloth Prestressed Reinforcement Construction Method and Its Special Equipment", which uses special equipment to directly stretch the two ends of carbon fiber cloth to carry out prestressed reinforcement of the structure, but the invention The construction method has a small tensile force on the carbon fiber cloth, which is only suitable for the case where the number of layers of the carbon fiber cloth is small, and when the carbon fiber cloth is stretched by this method, the carbon fiber cloth is prone to accidents due to uneven stress, so its work is reliable. secondly, the invention adopts the method of tensioning at both ends and requires the surface to be reinforced to be a plane, and curved or folded surfaces are not applicable; in addition, the tensioning equipment of the invention is complicated, has small pulling force and poor reliability, and is not suitable for tensioning There are also high requirements for the operating space of the tensioning construction. For example, in the narrow corner of the construction, it is necessary to reserve a working space for the tensioning equipment, so this part of the space cannot be pasted with carbon fiber cloth, and the practicability is limited.

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