Support monitoring system and monitoring method capable of monitoring bridge attitude and stress level

Abstract

The invention discloses a bearing monitoring system capable of monitoring the attitude and stress level of a bridge, including an intelligent bearing and a monitoring center. The intelligent bearing includes a lower bearing plate, a steel basin, a rubber plate, an intermediate steel plate, and a modified polytetrafluoroethylene plate. , stainless steel cold-rolled steel plate and top plate, the steel basin is connected with the lower support plate through the trapezoidal self-locking thread pair and the hoop; an intelligent detection module is set between the rubber plate and the middle steel plate, and the intelligent detection module includes insulating non-woven fabrics, piezoelectric ceramics Sheet and high-temperature shielded ultra-fine wires, the metal film of the piezoelectric ceramic sheet is connected to the charge amplifier, data processing and sending unit through the high-temperature shielded ultra-fine wires; the monitoring center includes the server, the bridge operation and maintenance center, the front-end control module, the entrance traffic guidance device and the Lane guidance device. The invention provides an intelligent bearing system with simple operation, stable connection and real-time and accurate monitoring of beam posture and stress levels in all directions of the bearing, and a remote monitoring and early warning method for actively eliminating the risk of bridge overturning in real time.

Description

technical field [0001] The invention relates to the technical field of anti-overturning design of bridges, in particular to a support monitoring system and a monitoring method capable of monitoring bridge attitude and stress level. Background technique [0002] At present, most of the bridges are reinforced with structural measures at the supports to prevent overturning, and it is impossible to monitor the stress level and the posture of the box girder in real time. It is difficult to put it into the support, even if it is put in, it will cause a safety hazard to the mechanical properties of the support, and the conventional support using the sensing unit cannot realize the force of the support in all directions, and then cannot achieve accurate support. Make judgments and early warnings when the seat is empty in a certain direction. [0003] In addition, various sensors are used for monitoring in the field of bridge anti-overturning in the existing technology, but few supp...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the anti-overturning bridges adopt structural measures at the support to prevent overturning, and it is impossible to monitor the stress level and the attitude of the box girder in real time. Even if there is a basin-type support with a sensing unit, the general sensing unit is relatively large. It is difficult to put it into the support, even if it is put in, it will cause safety hazards to the mechanical properties of the support, and the conventional support using the sensor unit cannot realize the force of the support in all directions, and then cannot achieve accurate alignment of the support Judgment and early warning when the seat is out of space in a certain direction

[0003] In addition, the existing technology also uses various sensors for monitoring in the field of bridge anti-overturning, but few use support monitoring systems. feedback function

[0004] On the other hand, in the existing technology, the elevation adjustment of traditional bridge supports is mainly mechanical (adding backing plates, spiral height adjustment) and filled with polyurethane to adjust the height; The steel backing plate of the required height is used to achieve the purpose of height adjustment. Before construction, it is necessary to design and process the steel backing plate of the corresponding thickness according to the height adjustment, and each time anchor bolts are required to anchor the top or bottom plate. There are cumbersome construction, Disadvantages such as inability to realize stepless height adjustment

Conventional spiral height adjustment is to install a height adjustment liner with a threaded pair in the middle of the support. Although the function of stepless height adjustment can be realized, the left height adjustment space needs to be grouted after the height adjustment in the middle of the support. It will inevitably lead to the inability to lower the height. When the height of the support needs to be lowered in the later stage, only one whole support can be replaced, and the cost is high. Filling polyurethane to adjust the height is to reserve a hole in the bottom plate of the support, and inject the modified liquid by pumping. Artificial materials such as polyurethane rubber use the principle of liquid-solid conversion to raise the rubber plate to achieve the purpose of heightening the support. Although the structure is simple and can realize stepless height adjustment, there are certain requirements for the height of the support steel basin and the thickness of the bottom plate. And if it needs to adjust the height multiple times, it is also necessary to set up multiple pressure injection channels, which requires high sealing performance of the support and has a certain impact on the performance of the support.

[0005] The above technical problems are also several difficult problems in the process of bridge design and construction. To sum up, the fundamental problem is that the existing technology still lacks a support monitoring system that can accurately judge the position of the void, remotely monitor the intervention and eliminate the feedback function in real time. Improve

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