Precise Geodetic Setting Out Activities in The Construction of Engineering Structures with Orientation in Predetermined Direction

• Autorzy: Angelov, Antonio

Warianty tytułu

PL

Precyzyjne wyznaczanie geodezyjne w budowie obiektów inżynierskich z orientacją w określonym kierunku

• Języki publikacji: EN

Abstrakty

EN

In the construction practice, there are engineering structures, where some complex requirements in the process of their building have to be meet, e.g., their positioning, geographical orientation and geometric determination. The current publication examines the specificity of geodetic activities, regarding the orientating of the main construction axes of the foundation and the supporting structures of the terrestrial telecommunication antennas in a predetermined direction, for example, in the parallel direction to the geographical meridian. The focus is on the assessment of the accuracy and the choice of appropriate methods and equipment in order to create the required geodetic network, as well as to perform accurate setting out works. The combination of demands, namely for a specific geographic orientation and precise relative accuracy of the setting elements, implies a suitable transition from the ellipsoidal geodetic coordinates to the projection plane of the setting out project. In this connection, the influence of the meridian convergence on the accuracy of the planning setting out works is examined. A mathematical approach is proposed to assess the need of elimination of this factor, depending on the value of the constructional tolerance and the geographic location of the site.The necessary precision for determining the geodetic ellipsoidal coordinates by GNSS (Global Navigation Satellite System) measurements as well as the required accuracy of the planning and elevation setting out works are shown.Using different geodetic methods and tools, a preliminary accuracy assessment approach and the choice of the appropriate coordinate projection and height reference system is also proposed. The real data, which were obtained in different Earth’s locations by the explained methodology, are presented. The established geodetic networks provide orientation of the main construction axes of the bases of the terrestrial communication antennas in the parallel direction to the geodetic meridian with an azimuth standard error - МА = ± 2÷5' (minutеs) and allowable error in distances and eleventions of the setting out elements, respectively - MdS ≤ ±3 mm, Mdh ≤ ± 2 mm.

Słowa kluczowe

PL

wytyczanie geodezyjne; budownictwo; konstrukcje inżynierskie; sieć geodezyjna

EN

geodetic setting-out activities; engineering structures; geodetic network

• Czasopismo: Inżynieria Mineralna
• Rocznik: 2024
• Tom: Vol. 1, no. 1
• Strony: 369--377
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Angelov, Antonio

• University of Architecture, Civil Engineering and Geodesy, Department of Applied Geodesy, 1 Hristo Smirnenski Blvd., 1164 Sofia, Bulgaria,

Bibliografia

• 1. Antova, G. "Evaluation of Factors, Influencing the Accuracy of the Digital Model, Obtained by Laser Scanning" 2020, IOP Conf. Ser.: Earth Environ. Sci., 609, 012086, DOI 10.1088/1755-1315/609/1/012086R.
• 2. Cvetkov, V. “Allowable discrepancies in the precise levelling sections based on real data”, Annual of the University of Architecture, Civil Engineering and Geodesy, 2022, Vol. 55, Issue 2, pp. 283-290, 5-G2.pdf (uacg.bg) .
• 3. Daskalova, M.,Zdravchev. I, “Mathematical Geodesy”, Page 235-240, Sofia, 2005 (in Bulgarian).
• 4. Ilieva, Е. Drainage of streets in grading plans, Ph.D. thesis, University of Architecture, Civil Engineering and Geodesy, 2006 (in Bulgarian).
• 5. Penev, P. “Engineering geodesy – Part 1”, Sofia, 2018 (in Bulgarian).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).

Identyfikatory

DOI

10.29227/IM-2024-01-42