Device for safely laying fiber grating sensors and construction method

Abstract

The invention relates to a device for safely laying fiber grating sensors and a construction method, and belongs to the technical field of fiber sensor application. The device comprises a thin-wall protective sleeve and a reserved hole channel, wherein the thin-wall protective sleeve is arranged at a to-be-monitored part of a concrete structure; a grouting hole and an exhaust hole are formed in the thin-wall protective sleeve; the inner wall of the thin-wall protective sleeve is uniformly coated with a release agent; the fiber grating sensors penetrate into the thin-wall protective sleeve, andthe two ends of the fiber grating sensors are temporarily fixed; and the grouting hole is used for pouring cement mortar. According to the construction method, the construction process of firstly penetrating bundles, then grouting and then pouring concrete is adopted, the extensive operation environment of the concrete structure engineering is overcome, safe laying construction of the fiber grating sensors for concrete is realized, and the possibility of damage and breakage of the fiber grating sensors is greatly reduced. Moreover, the fiber grating sensors are directly wrapped with the cement mortar, physical quantities such as real temperature and strain of the concrete structure can be directly monitored, the sensitivity is high, the monitoring precision is high, the efficiency is high, and technical support is provided for structural damage monitoring and evaluation.

Description

technical field [0001] The invention relates to the technical field of measuring the pumping performance of concrete mixtures, in particular to a device and method for safely arranging optical fiber grating sensors. Background technique [0002] Due to its small size, light weight, high sensitivity, corrosion resistance, anti-electromagnetic interference, good electrical insulation, small transmission loss, and long-distance monitoring and transmission, fiber grating sensors are widely used in aerospace, civil engineering, and composite materials. , petrochemical and many other fields have been successfully applied. [0003] Structural health and safety monitoring in civil engineering is one of the most active technical fields for the application of fiber grating sensors. However, due to the relatively poor shear resistance of fiber gratings, it is easy to break in the typical extensive operating environment of civil engineering structure construction. Therefore, How to pro...

AI Technical Summary

Problems solved by technology

[0003] Structural health and safety monitoring in civil engineering is one of the most active technical fields for the application of fiber grating sensors. However, due to the relatively poor shear resistance of fiber gratings, it is easy to break in the typical extensive operating environment of civil engineering structure construction. Therefore, How to protect the fiber grating sensor so that it will not be damaged by impact during the construction process of pouring, vibrating and molding is the key to the successful application of fiber grating sensor in structural health and safety monitoring

[0004] Traditional packaging methods such as substrate type, tube type, a...

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