Large-scale Bridge Distortion Measuring Technique Discussion

Abstract

Deformation Measurement is a large measuring deformation monitoring of bridge and the bridge is structurally controlled an important part of long-term monitoring and diagnosis of health. The article comprehensively analysis contemporary advanced measuring equipment and new technology, such as GPS global positioning system, surveying robots and measuring digital close-range photogrammetry system, and then formulates advanced and reasonable surveying measurement, make up the corresponding data processing software to create real-time monitoring system and large bridges monitoring data analysis and management system, formed a complete bridge suitable for large deformation measurement theory and techniques to ensure the normal operation of large-scale bridge building and the quality is of great significance. Large-scale bridge cost is very high; it has strategic significance in many ways, such as transportation, military, social life and so on. It can be predicted that, in the next 20 to 30 years, long-span bridge is still growth rapidly. Large-scale bridge is influenced by many aspects for the construction and operation. During the process of construction, bridge is a typical time-dependant structure, having a close relationship with construction technology. In addition, attack and corrosion of the environment, dynamic loading of vehicle and wind damage structure and reduce resistance and all of that affect the service life of bridge. With the vigorous development of the transportation industry, bridge load tends to increase with new structure, new materials and new technology. The test technology of bridge engineering, constantly developing and improving is increasingly valued by people. Bridge monitoring can be divided into experiment monitoring and construction monitoring. In order to study the changes of the bridge, it must measure the variety and size of geometric quantities, for the characteristics of large-scale, for example, cable-stay bridge and suspension bridge, is large span, high tower and flexibly main span. Therefore, it is necessary that the bridge monitoring is used by geodesy and special engineering surveying instrument and methods {[}1].