Monitoring method for differential settlement of structure section based on inclination angle measurement

Abstract

The invention provides a monitoring method for differential settlement of a structure section based on inclination angle measurement. A node is arranged at each corner part of the structure section, at least one node except for two end points located at the side is arranged on a curve side of the structure section, a measuring point is arranged at each corner part of the structure section, the number of the measuring points arranged at the curve side of the structure section is not less than the number of the nodes, a tilt angle sensor is arranged at each measuring point and can be used for measuring a first tilt angle and a second tilt angle, relative to two mutually perpendicular directions of a horizontal surface, at each measuring point part, and the settling volume of any point in the structure section is obtained based on a reserved inverse algorithm according to the first tilt angle and the second tilt angle measured by each measuring point, so that the monitoring method for differential settlement of the structure section based on inclination angle measurement provided by the invention not only can be used for monitoring the settling volume of any point in the structure section and has high measurement result accuracy, but also is wide in application range.

Description

technical field [0001] The invention belongs to the field of civil structure monitoring, and in particular relates to a method for monitoring differential settlement of structural sections based on inclination measurement. Background technique [0002] In the construction and operation period monitoring of municipal projects such as bridges and tunnels, the differential settlement of structures is often the monitoring item that engineers pay the most attention to. The overall settlement and uneven settlement of structures are the most intuitive reflections of structural design rationality and construction quality. At the same time, differential settlement will also lead to structural cracking, which affects the life of the structure and the smoothness of vehicle traffic, and is the most important indicator of the health status and service performance of the structure. [0003] Manual leveling, static levels, and GPS (Global Positioning System) are the most conventional moni...

AI Technical Summary

Problems solved by technology

[0003]Manual leveling, static level, GPS (Global Positioning System) are the most conventional monitoring methods for structure settlement, but these methods have their own limitations: manual leveling The procedures are complicated and can only maintain a low monitoring frequency, which cannot meet the development trend of the infrastructure maintenance system towards intelligent operation and maintenance; the static level measures the liquid level or hydraulic pressure of each measuring point to obtain the settlement of the measuring point, and the system is subject to Influenced by various environmental factors such as temperature and air pressure, the measurement accuracy and measurement range of the pressure sensor limit this type of system to monitor structures with large elevation differences. In addition, the static level is a series measurement system, and the damage of a single measurement node It will affect the accuracy of the entire system; the accuracy of the global positioning system is low, the algorithm is complex, and it is not sensitive to changes in the height direction of the measuring point

[0005] In the above disclosed technologies, the tunnel and roadbed are regarded as a one-dimensional linear structure. However, in reality, even ultra-long linear facilities such as tunnels and bridges are composed of multiple structural segments. Each structure The settlement within a segment is independent, and a single structural segment will deform in the height direction under the action of an external load, resulting in differential settlement. In addition, a single structural segment is often not a linear structure, and its differential settlement in the width direction cannot be tolerated. ignore

Images