Analyzing the deformations of a bridge using GPS and levelling data

S. Erol, B. Erol, T. Ayan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Citations (Scopus)

Abstract

The aim of this study is analysing 1D (in vertical) and 3D movements of a highway viaduct, which crosses over a lake, using GPS and levelling measurement data separately and their combination as well. The data are acquired from the measurement campaigns which include GPS sessions and precise levelling measurements, performed with six-month intervals for two years. In 1D analysis of the (vertical) deformations, the height differences derived from GPS and levelling data were evaluated. While combining the height-difference sets (GPS derived and levelling derived) in the third stage of 1D analysis, Variance Component Estimation (VCE) techniques according to Helmert's approach and Rao's Minimum Norm Quadratic Unbiased Estimation (MINQUE) approach have been used. In 3D analysis of the deformations with only GPS data classical S-transformation method was employed. The theoretical aspects of each method that was used in the data analyses of this study are summarized. The analysis results of the deformation inspections of the highway viaduct are discussed and from the results, an optimal way of combining GPS data and levelling data to provide reliable inputs to deformation investigations is investigated in this study.

Original languageEnglish
Title of host publicationGeodetic Deformation Monitoring
Subtitle of host publicationFrom Geophysical to Engineering Roles - IAG Symposium
PublisherSpringer Verlag
Pages244-253
Number of pages10
ISBN (Print)9783540385950
DOIs
Publication statusPublished - 2006
EventInternational Symposium on Geodetic Deformation Monitoring - Jaen, Spain
Duration: 17 Mar 200519 Mar 2005

Publication series

NameInternational Association of Geodesy Symposia
Volume131
ISSN (Print)0939-9585

Conference

ConferenceInternational Symposium on Geodetic Deformation Monitoring
Country/TerritorySpain
CityJaen
Period17/03/0519/03/05

Keywords

  • Deformation Analysis
  • GPS
  • Levelling
  • S-Transformation
  • Variance Component Estimation

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