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Open AccessArticle

Investigation of the Precision in Geodetic Reference-Point Positioning Because of Temperature-Induced Pillar Deflections

1
Mariborski vodovod d.d., Jadranska cesta 24, 2000 Maribor, Slovenia
2
Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(16), 3489; https://doi.org/10.3390/s19163489
Received: 30 May 2019 / Revised: 2 August 2019 / Accepted: 4 August 2019 / Published: 9 August 2019
(This article belongs to the Section Remote Sensors, Control, and Telemetry)
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Abstract

To perform geodetic measurements of displacements of the ground and manmade constructions, stabilised reference points are needed from which control points on the object or its surroundings could be measured. Reference points are most commonly stabilised with reinforced concrete pillars; however, they are not always constructed in an appropriate manner. The influence of temperature variation within a pillar on the position of the fixed screw for forced centring is not negligible and should be considered when performing precise measurements. In this research paper, the displacement of a pillar was calculated as a result of the temperature changes in the pillar, and then an experiment was performed in which the pillar was heated from one side, and the horizontal displacement of the fixed screw for forced centring was measured. Both, calculations and measurements, show that at a temperature difference of 16.2 °C, the fixed screw on a 1.5 m high pillar moves by approximately 1 mm, which is a displacement that should be taken into account in precise measurements. View Full-Text
Keywords: reinforced concrete pillar; based reference point; influence of temperature; calculated displacement; measured displacement; temperature distribution reinforced concrete pillar; based reference point; influence of temperature; calculated displacement; measured displacement; temperature distribution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Močnik, R.; Koler, B.; Zupan, D.; Ambrožič, T. Investigation of the Precision in Geodetic Reference-Point Positioning Because of Temperature-Induced Pillar Deflections. Sensors 2019, 19, 3489.

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