A Vertical and Horizontal Deformations Monitoring of FSS Rector’s Administrative Block Using Conventional Geodetic Techniques
Published 2025-05-06
Keywords
- Deformation,
- GNSS,
- MATLAB,
- USACE,
- Ground Survey Method
- Epoch ...More
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Abstract
Many circumstances commonly contribute to changes in the size, shape, or dimensions of large structural objects. Therefore, monitoring the nature of these changes—especially those that may lead to structural collapse—is essential. This study focuses on the monitoring and analysis of vertical and horizontal deformations of the Rector’s Administrative Block located within the Federal School of Surveying, Oyo, using ground survey methods. The objectives are: to carry out a preliminary study of the building through a reconnaissance survey; to ascertain the positional status of structural monuments already installed on the building through first-order survey observations; to perform least squares adjustment on the observed data using ADJUST software and MATLAB; and to compute the displacement magnitudes for all structural points and compare them with their respective 95% confidence ellipses for deformation analysis. The methodology adopted involves primary data acquisition using GNSS receivers, Total Station, and a Geodetic Digital Level. A total of eight lawn beacons and thirteen structural target points were observed. Deformation analysis was conducted by comparing the computed displacement magnitudes of each structural point with the USACE (2018) geometric standard to determine whether noticeable alterations or movements had structurally occurred, particularly between the observed epochs and data acquired in 2011. The results indicated that the building was very stable at the time of observation. It is therefore recommended that all large engineering structures be subjected to deformation studies.
Keywords: Deformation, GNSS, MATLAB, USACE, Ground Survey Method, Epoch.
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References
- Ameh, B. M. (2013): Determination of Components of Deflection of the Vertical of Lobi Area of Makurdi,Benue State, Using GPS (GNSS) and Precise Levelling Observations. Unpublished M.Sc. Thesis of the Department of Surveying and Geo-informatics, Nnamdi Azikiwe University Awka.
- Eteje, S.O Ono, M.N and Oduyebo, O.F (2018): “Monitoring and Analysis of Vertical and Horizontal Deformations of a Large Structure Using Conventional Geodetic Techniques Journal of Environment and Earth Science, www.iiste.org ISSN 2224-3216 (Paper) ISSN 2225-0948 (Online) Vol.8, No.12, 2018.
- Gethin, R and Laura, H (2005): Deformation Monitoring and Analysis of Structures using Laser Scanners’. A paper presented at FIG Working Week and GSDI-8 Cairo, Egypt within 16th to 21st 2005.
- Oloyede, S.A Omogun, C.B and Akinjare, O.A. (2010): “Tracking Causes of Building Collapse in Nigeria”. Journal of Sustainable Development, Vol.3, No. 3, pp 127-132.
- Pepe, M and Costantino, D (2020): “Techniques, Tools, Platforms and Algorithms in Close Range Photogrammetry in Building 3D Model and 2D representation of objects and Complex Architectures”, Computer-Aided Design and Application, Vol. 18, No. 1, pp. 42-65, 2020 view at: Publisher site I Google Scholar.
- Tribune Online Daily News broadcasted on 27th of December 2022 and accessed through https://tribuneonlineng.com on the23rd of April, 2023.
- USACE, (2018): “Engineering and design structural deformation surveying”. An annual manual published by Department of the Army US Army Corps of Engineers, Washington (EM 1110-2-1009)., DC 20314-1000.
- Wieser, A. and Capra A (2017): Special Issue: Deformation Monitoring. Applied Geomatic, Vol. 9, No. 2, pp 79-80. doi.org/10.1007/s12518-017-0192-0.
- Mir, Azeem. Some Rare Decays of Particles within R-parity violating Super-symmetric Model. Diss. Thesis (PhD), COMSATS Institute of Information Technology, 2010.