An automatic method for generating multiple alignment alternatives for a railway bypass

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2023_comoperes_vazquez_automatic.pdf (2.94 MB)
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URI: http://hdl.handle.net/10347/30610
E-ISSN: 0305-0548
DOI: 10.1016/j.cor.2023.106217

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2023

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Elsevier
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Abstract

This paper deals with the problem of designing a bypass on a railway line. Based on a geometrical model capable of determining automatically the need of major structures (bridges, tunnels, overpasses and underpasses), the optimal design of a railway bypass is formulated in the framework of Mixed Integer Non Linear Programming (MINLP), and it is solved with a numerical algorithm which provides different layout alternatives that are optimal solutions (local minima) from the economic point of view. The proposed method is tested on a case study with the aim of showing its practical usefulness as a support tool for engineers in order to accomplish the complex and time-consuming task to generate a set of initial alternatives for the design of a railway bypass

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Railway bypass| Mixed integer non linear programming| Railway alignment optimization| Obtaining local minima

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Computers & Operations Research 154 (2023) 106217

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This research was funded by Ministerio de Ciencia e Innovación (Spain) grant number TED2021-129324B-I00, and by the collaboration agreement between Xunta de Galicia (Spain) and Universidade de Santiago de Compostela (Spain) which regulates the Specialization Campus “Campus Terra”. Additionally, the authors are grateful to Concello de Guitiriz (Spain) for financial support through the contract Optimal design of multiple alignment alternatives for a bypass on the railway line A Coruña-Palencia passing through Parga-Guitiriz (Lugo), ref. 2021-CP138 . Finally, third and fourth authors thank the support given by Xunta de Galicia (Spain) under research projects ref. ED341D R2016/023 and GI-1563ED431C2021/15, respectively

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© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

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