Arch bridge main arch continuous displacement monitoring device

Abstract

The invention provides an arch bridge main arch continuous displacement monitoring device which comprises an arch structure. A protection pipe is arranged at the bottom of the arch structure and fixedalong the arch structure, a displacement meter is sleeved in the protection pipe, the displacement meter is an array type displacement meter, and the total length of the displacement meter is not smaller than 1.01 times that of the arch structure. The device is not influenced by factors such as observation errors and external environment, and the value measurement precision is high, measurement points are dense, measurement value continuity is good, and the overall displacement condition of the structure can be reflected; the function of automatically monitoring deformation in the horizontaldirection and the vertical direction can be achieved, and the real-time monitoring requirement is met; the device is convenient to install on site, after the device is put into use, one technician cancomplete on-site monitoring work, 3-5 persons can be saved, the working efficiency is greatly improved, and the device has the advantages of being detachable, reusable, easy to maintain and high in application and popularization value.

Description

technical field [0001] The invention relates to a continuous displacement monitoring device for a main arch of an arch bridge. Background technique [0002] During the construction and operation stages of arch bridges, whether the displacement of the main arch is within a reasonable range is an important parameter for judging the safety of the bridge structure, so long-term monitoring is required. In addition, for cast-in-situ arch bridges using cantilevered steel arches, the displacement of the steel arches during the construction period is also an item that needs to be monitored. [0003] One of the biggest advantages of arch bridges is their large spanning capacity. Therefore, arch bridges are mostly built to cross mountains, valleys or rivers, so it is usually impossible to set up fixed monitoring points under the bridge. In order to obtain the displacement of the main arch, it is generally to find a relatively stable place within a certain range of the arch bridge to s...

AI Technical Summary

Problems solved by technology

However, this method needs to set up an independently working steel pipe arch, which is difficult to construct, high in cost, and difficult to popularize and apply. It is still a single-point measurement, and the distance between the measurement points is large, which makes the continuity poor.

In addition, this technology mainly serves for bridge health monitoring and testing in the operation stage after the main arch is formed, and cannot be applied in the construction stage

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