A method for monitoring the deformation of concrete in pipes poured into steel pipe arches of super-large bridges

Abstract

The invention discloses a method for monitoring deformation of pipe concrete filled in a steel pipe arch of a super-large bridge. The method is characterized in that through utilizing the fiber Bragggrating technology to detect the drift of the center wavelength of the reflected light, the strain of the pipe concrete structure filled in the steel pipe arch of the super-large bridge is monitored.The method is advantaged in that properties of long monitoring distance, large monitoring range, wide monitoring angle, accurate monitoring, high test accuracy and accurate positioning are achieved, properties of low equipment cost, low energy consumption, corrosion resistance, electromagnetic interference resistance, good long-term stability and easy integration can be further achieved, and requirements of deformation monitoring of the pipe concrete filled in the steel pipe arch of the super-large bridge can be satisfied.

Description

technical field [0001] The invention relates to a bridge monitoring method, in particular to a method for monitoring the deformation of concrete in a tube poured into a steel tube arch of a super-large bridge. Background technique [0002] Through the monitoring and evaluation of the health status of the bridge structure, early warning signals are issued for the bridge under various weather and traffic conditions and when the bridge operation status is abnormal, and the basis for bridge maintenance, repair and management measures is provided, and timely measures are taken to prevent the bridge Collapse, local damage, the purpose of protecting and prolonging the service life of the bridge. my country's bridge structural health monitoring is still in its initial stage. With the deepening of bridge structural health monitoring, it needs to be improved and perfected in remote monitoring, improving system reliability, improving data processing and analysis theory, etc., and there...

AI Technical Summary

Problems solved by technology

[0003] (1) The geometric optics measurement method not only consumes a lot of manpower and time costs in the long-term monitoring process, but also cannot guarantee the timeliness of the monitoring data. The monitoring data needs to be manually entered into the database later, and the analysis and monitoring results have an inevitable lag

[0004] (2) The vibrating wire sensor is based on the principle of mechanical structure, with steel wire as the conversion element, and has hysteresis characteristics. Therefore, it can only be applied to static and quasi-dynamic tests not greater than 10Hz

Most of the external conditions of the bridge are the effects of dynamic load, climate, erosion, impact and other emergencies, etc. The applicability of vibrating wire sensors has great limitations

[0005] (3) It is difficult for ordinary sensors to survive effectively for a long time. Under the influence of climate, erosion, impact, other emergencies and electromagnetic interference on the outside of the bridge, it is very easy to cause corrosion and denaturation damage to the sensor and its leads, making it difficult for the sensor to operate normally for a long time

Therefore, ordinary electric measuring sensors will not be able to meet the task of long-term monitoring

[0006] (4) Most of the traditional sensors are point sensors, which are not only complicated in installation and construction, but also have many and messy monitoring lines in the later stage, making it difficult to monitor large areas and large areas. Manual monitoring is required during testing, and real-time online monitoring and evaluation cannot be achieved.

[0008] (6) Most of the existing bridge structure monitoring and status assessment systems belong to a single monitoring system or a single management system, and it is not easy to integrate and integrate a unified monitoring and analysis platform

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