An Application Study Of GPS Technique To The Deformation Monitoring Of Wharfs

In recent years, with the rapid development of the globalpositioning system (GPS), the GPS has been widely used in thestructural health monitoring of many large-scale engineering structuressuch as high-rise buildings and long-span bridges. GPS static relativepositioning is of high precision and has become an important method inlarge-scale engineering structural monitoring. Based on the engineeringapplication of GPS in structural health monitoring, a series of keytechniques have been systematically studied on the optimization designof GPS applications, the multi-path effect, and the field monitoring ofreal structures.In this thesis, a study is conducted on the application of GPStechnique in the health monitoring of wharfs. According to thefundamental priciples of GPS, the layout, selection, and optimizationdesign of the control network for wharfs are discussed in detail. Byputting emphasis on monitoring long-term deformations and short-termdisplacements, a systematic study is conducted on the application of theGPS technique to the field monitoring of real engineering structures. Combining three-year GPS displacement monitoring data collected fromthe Hangzhou Chongxian wharf with conventional monitoring means,the effect of long-term GPS structural monitoring is discussed. At thesame time, the layout of control points, monitoring process, and dataprocessing in the GPS application are summrized. In addition, the errorsources and variations in GPS measurement, error reduction, andprecision improvement are analyzed. The monitoring documents arestudied and the monitoring results are examined.Finally, the research work in this thesis is summarized and thefurther study in the future is discussed.