System and method for continuously monitoring bridge deformation through foundation radar

Abstract

The invention belongs to the field of bridge monitoring and particularly relates to a system and method for continuously monitoring bridge deformation through foundation radar. The system comprises concrete piers (3), fixed supports (2) and foundation radar instruments (1), wherein each concrete pier (3) is fixed to a foundation, each fixed support (2) is connected with the corresponding concrete pier (3), and each foundation radar instrument (1) is connected with the corresponding fixed support (2). Each foundation radar instrument (1) is used for conducting interference-strategy measurement on a bridge (4). The foundation radar instruments (1), the fixed supports (2) and the concrete piers (3) are located between the bridge (4) and the foundation. By the adoption of the system and method for continuously monitoring bridge deformation through the foundation radar, the problem that an existing instrument can only monitor bridge deformation for once is solved, and the design basis stability of the instruments is achieved; through the method for continuous monitoring, an operator can continuously monitor a monitored target for a long time without arranging the instruments for a long time; the system is simple in structure and convenient to debug, and capable of continuously and accurately monitoring the health condition of the bridge.

Description

technical field [0001] The invention relates to a system and method for continuous monitoring of bridge deformation by ground-based radar, which is suitable for monitoring bridges and other engineering structures. Background technique [0002] Ground-based radar microwave measuring instrument is mainly used for deformation monitoring of bridges and buildings. [0003] At present, ground-based radar instruments are generally installed on movable supports. When monitoring bridges, choose a place with a good line of sight and easy to measure to set up the instrument for deformation measurement. It uses microwave interferometry to determine the amount of deformation by comparing the phase difference of the reflected signals. In the bridge deformation observation, the deformation of the bridge within this period can be measured. The instrument itself is different from the total station and other devices. It does not have a "center". Due to the variability of placement, it is im...

AI Technical Summary

Problems solved by technology

The instrument itself is different from the total station and other devices. It does not have a "center". Due to the variability of placement, it is impossible to accurately ensure that the IBIS-S instrument is placed in the same position only with the movable bracket

However, the location and orientation of each erection are different, and the data measured by the instrument can only be used as a single analysis, which cannot be compared. It is also impossible to determine the deformation of the monitoring target in the two periods before and after, so long-term deformation analysis of the bridge cannot be carried out.

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