Original scientific paper

Determination of Horizontal Displacements of Calibration Baseline Pillars Using a Deformation Analysis Method

Karlo Stipetić orcid.org/0009-0002-4369-9897 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *
Mladen Zrinjski orcid.org/0000-0003-0834-6009 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *
Đuro Barković orcid.org/0000-0003-3382-253X ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *
Ivka Kljajić orcid.org/0000-0001-6144-4172 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *
Antonio Tupek orcid.org/0000-0001-7604-2993 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *
Krunoslav Špoljar orcid.org/0000-0002-6976-9307 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia *

* Corresponding author.

Abstract

When constructing complex engineering structures such as long tunnels, bridges, dams, and high-rise buildings, the quality requirements for geodetic work are increasingly demanding. High-quality geodetic work depends on a reliable geodetic reference network from which measurements are conducted and on the application of precise geodetic instruments. A quality geodetic reference network is characterized by a high level of stability. The stability of the geodetic reference network can be examined and determined through geodetic surveys and analyses to assess the displacement of pillars within the reference network. The aim of this research is to determine the horizontal displacements of the pillars in the calibration base of the Faculty of Geodesy at the University of Zagreb. A special-purpose geodetic network configuration was defined, and the displacements of the calibration base pillars were determined in a 2D local left-oriented Cartesian coordinate system, with corresponding accuracy assessments. Measurements were carried out in three epochs (September 2023, February 2024, and April 2024) using the terrestrial geodetic survey method, all for the purpose of analyzing the stability of the calibration baseline. To determine the displacements of pillars and detect gross measurement errors, the generalized Baarda statistical data snooping method was applied. The processing and analysis of geodetic measurement results identified a statistically significant displacement of one of the calibration base pillars, which may indicate potential instability of the calibration baseline. This paper provides a comprehensive overview of the planning, preparation, execution, processing, and analysis of geodetic measurements for determining the horizontal displacements of pillars using the deformation analysis method.

Keywords

calibration baseline; geodetic network; geodetic survey; deformation analysis; displacement

Hrčak ID:

330545

URI

https://hrcak.srce.hr/330545

Publication date:

31.12.2024.

Article data in other languages: croatian

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