Device and method for monitoring vertical displacement of bridge body of multi-section constructed bridge

Abstract

The invention discloses a device and method for monitoring the vertical displacement of a bridge body of a multi-section constructed bridge. The device comprises a standard liquid tank, a liquid supplementing tank, a liquid surface control pipe, a liquid supplementing pipe, a liquid communicating pipe and a displacement sensor, wherein the position, close to the top, of the side wall of the standard liquid tank is provided with a liquid surface control hole, the standard liquid tank is filled with liquid which is flush with the top edge of the liquid surface control hole, a ventilating pipe with a valve is arranged on the top of the standard liquid tank, the liquid supplementing tank is filled with liquid, the bottom surface elevation of the liquid supplementing tank is not lower than thetop surface elevation of the standard liquid tank, one end of the liquid surface control pipe is connected with the top of the liquid supplementing tank, the other end of the liquid surface control pipe is connected with the liquid surface control hole, the two ends of the liquid supplementing pipe are connected with the bottom of the standard liquid tank and the bottom of the liquid supplementingtank respectively, one end of the liquid communicating pipe is communicated with the lower portion of the standard liquid tank, the end, close to the standard liquid tank, of the liquid communicatingpipe is provided with a working valve, and the displacement sensor is connected with the standard liquid tank through the liquid communicating pipe. The device and method are suitable for automatically monitoring the vertical displacement of the bridge body in the bridge multi-section construction period and also suitable for automatically monitoring the vertical displacement for a long time after the structure is completed.

Description

technical field [0001] The invention relates to the fields of bridge structure monitoring, detection and maintenance, management and maintenance. More specifically, the present invention relates to a device and method for monitoring the vertical displacement of a girder body of a bridge constructed in sections. Background technique [0002] With the progress of our country's economy and society in recent years, bridge construction has developed vigorously, and the number of long-span bridges that have been built or are under construction is increasing day by day. , Suspension bridges have been used on a large scale. In order to ensure the safety of this type of bridge structure during operation, displacement monitoring equipment is installed or planned to be installed after the bridge is completed. For the safety of its construction period, the artificial periodic measurement method based on the level (total station) is still used alone at present, which has the disadvantag...

AI Technical Summary

Problems solved by technology

For the constant maintenance of the reference liquid level in the long-term monitoring process, there are mainly: (1) attaching a layer of silicone oil, liquid paraffin and other floating measures on the liquid surface to reduce the evaporation rate of the liquid; (2) setting an automatic water replenishment device, but the existing automatic water replenishment device Both include long-term work of pumping equipment that requires external power, which is neither economical nor energy-saving, but also increases the complexity of structural design. Especially when the power supply and performance of pumping equipment cannot be continuously satisfied, this method will not be able to achieve liquid level compensation. When the equipment starts to replenish water, it will also cause large fluctuations in the reference liquid level, which will lead to large fluctuations in the readings of the displacement monitoring sensor and cause false alarms

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