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Article

Adjustment Algorithm for Free Station Control Network of Ultra-Large Deepwater Jacket

1
Offshore Oil Engineering Co., Ltd., Qingdao 266555, China
2
CNOOC (China) Limited Shenzhen Branch, Shenzhen 518054, China
3
School of Geodesy and Geomatics, Hubei Luojia Laboratory, Wuhan University, Wuhan 430079, China
*
Author to whom correspondence should be addressed.
Algorithms 2025, 18(5), 292; https://doi.org/10.3390/a18050292
Submission received: 3 March 2025 / Revised: 26 April 2025 / Accepted: 14 May 2025 / Published: 19 May 2025
(This article belongs to the Special Issue Algorithms and Application for Spatiotemporal Data Processing)

Abstract

The offshore oil engineering jacket is a giant super-heavy steel frame structure with dimensions in the hundreds of meters. A high-precision free station control network is usually arranged around it to ensure construction accuracy. However, as the jacket is gradually assembled, its extreme weight will cause the widespread deformation of the surrounding ground surface, and each control point may be affected to varying degrees, resulting in the non-uniform deformation of the entire network. For adjustments of control networks in the subsequent phases, if the same starting point as the first phase is chosen without careful analysis, the starting points’ non-uniform deformation will degrade the whole network’s accuracy. Considering the particularities of the free station control network, this paper proposes an adjustment algorithm consisting of a three-step analytical method. Firstly, the initial coordinates of the points of the current phase are obtained through classical free network adjustment; second, stable and unstable points are identified via coordinate similarity transformation between the current and the first phase; and finally, quasi-stable adjustment is conducted. The experimental data analysis of a jacket control network shows that this method can effectively identify stable and unstable points, thereby ensuring construction accuracy and jacket stability.
Keywords: jacket; free station; classical adjustment of free network; coordinate similarity transformation; quasi-stable adjustment jacket; free station; classical adjustment of free network; coordinate similarity transformation; quasi-stable adjustment

Share and Cite

MDPI and ACS Style

Yang, X.; Shu, W.; Wang, H.; Li, H.; Wang, Y.; Zhang, D.; Liu, J.; Wang, D.; Xiao, W. Adjustment Algorithm for Free Station Control Network of Ultra-Large Deepwater Jacket. Algorithms 2025, 18, 292. https://doi.org/10.3390/a18050292

AMA Style

Yang X, Shu W, Wang H, Li H, Wang Y, Zhang D, Liu J, Wang D, Xiao W. Adjustment Algorithm for Free Station Control Network of Ultra-Large Deepwater Jacket. Algorithms. 2025; 18(5):292. https://doi.org/10.3390/a18050292

Chicago/Turabian Style

Yang, Xianyang, Wei Shu, Huoping Wang, Haifeng Li, Yi Wang, Di Zhang, Jiayu Liu, Deyang Wang, and Wangsui Xiao. 2025. "Adjustment Algorithm for Free Station Control Network of Ultra-Large Deepwater Jacket" Algorithms 18, no. 5: 292. https://doi.org/10.3390/a18050292

APA Style

Yang, X., Shu, W., Wang, H., Li, H., Wang, Y., Zhang, D., Liu, J., Wang, D., & Xiao, W. (2025). Adjustment Algorithm for Free Station Control Network of Ultra-Large Deepwater Jacket. Algorithms, 18(5), 292. https://doi.org/10.3390/a18050292

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