Nickel-titanium-niobium memory alloy fiber line externally-pasted prefabricated prestressed plate and construction method

Abstract

The invention discloses a nickel-titanium-niobium memory alloy fiber line externally-attached prefabricated prestressed plate and a construction method, the nickel-titanium-niobium memory alloy fiber line externally-attached prefabricated prestressed plate comprises a plate body and nickel-titanium-niobium memory alloy fiber lines, the plate body is formed by a high-strength grouting material, and the nickel-titanium-niobium memory alloy fiber lines are arranged in the plate body in a roundabout shape; the nickel-titanium-niobium memory alloy fiber wire comprises a plurality of linear prestress applying sections, every two adjacent prestress applying sections are connected through an arc-shaped anchoring section, and a pre-buried steel sleeve is arranged on the inner side of each anchoring section. Reset ranges of different requirements of the nickel-titanium-niobium memory alloy fiber line prefabricated prestressed plate are designed, the plate can achieve the reset function within the load ranges of different stages, the crack is restored to be within 0.20 mm in the normal use state specified by the specification. The problems that road and bridge structural bodies are difficult to repair and maintain and a huge amount of manpower and material resources need to be consumed are solved; the prestress direction of the plate can be changed according to the direction of the nickel-titanium-niobium memory alloy fiber lines.

Description

technical field [0001] The invention relates to the technical field of prestressed panels, in particular to a prefabricated prestressed panel pasted with nickel-titanium-niobium memory alloy fiber wires and a construction method. Background technique [0002] With the acceleration of the construction of my country's transportation power, my country's roads and bridges have developed rapidly in recent years. The total number of bridges has further increased. On the one hand, the task of bridge inspection, maintenance and reinforcement has been further intensified; Inadequate maintenance, untimely maintenance, improper decision-making and other factors in the later maintenance process lead to irreversible damage to bridges, resulting in frequent collapse accidents of vicious, large and extra-large bridges in my country, resulting in a large number of casualties and economic losses. In addition, my country's bridge maintenance management decision-making system is backward, resu...

AI Technical Summary

Problems solved by technology

The total number of bridges has further increased. On the one hand, the task of bridge inspection, maintenance and reinforcement has been further intensified; Inadequate maintenance, untimely maintenance, improper decision-making and other factors in the later maintenance process lead to irreversible damage to bridges, resulting in frequent collapse of vicious, large and extra-large bridges in my country, resulting in a large number of casualties and economic losses

In addition, my country's bridge maintenance management decision-making system is backward, resulting in a huge amount of manpower and material resources for bridge maintenance

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