Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment

N. Correia dos Santos; A. Colaço; P. Soares; A. Castanheira-Pinto; P. Alves Costa; A. M. Kaynia

doi:10.1007/978-3-031-96106-9_68

Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment

N. Correia dos Santos
, A. Colaço
, P. Soares
, A. Castanheira-Pinto
, P. Alves Costa
, A. M. Kaynia

FCNET - Faculty of Natural Sciences, Engineering and Tecnology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Dynamic amplification effects may occur when a railway line, with high operation speed, is in a soft soil. In these scenarios, it is necessary to analyse the impact the critical speed phenomenon on safety and operational costs of the railway track. A ground treatment may contribute to an improvement of the system dynamic behaviour. This treatment may be based on replacing a portion of the natural soil with stiffer materials or by employing grouting. The current paper presents a numerical study that shows the improvement of the dynamic behaviour of the ground-track system obtained by means of the soil reinforcement. This study also evidences that localized ground reinforcement below the track yields a response similar to extending the reinforcement over a larger area. This conclusion is particularly interesting for engineering practice and for numerical/semi-analytical analysis. The definition of the critical speed as the value that induces larger amplification due to the passage of a single load is a conservative approach. Finally, it was possible to confirm that an approach based on the calculation of the dispersion curves provides an adequate estimation of the system’s critical speed.

Original language	English
Title of host publication	Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2
Editors	Álvaro Cunha, Elsa Caetano
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	660-668
Number of pages	9
ISBN (Print)	9783031961052
DOIs	https://doi.org/10.1007/978-3-031-96106-9_68
Publication status	Published - 2025
Event	11th International Conference on Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Porto, Portugal Duration: 2 Jul 2025 → 4 Jul 2025

Publication series

Name	Lecture Notes in Civil Engineering
Volume	675 LNCE
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Conference

Conference	11th International Conference on Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025
Country/Territory	Portugal
City	Porto
Period	2/07/25 → 4/07/25

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

Funding

The authors would like to express their gratitude to “The Fund for Bilateral Relations of EEA Grants”, by the financial support through the initiative with the reference FBR_OC1_71_COFAC. The present paper has been funded by “FCT – Portuguese Science and Technology Foundation”, through the research project PTDC/ECI-EST/1481/2021. This work was also financially supported by Funding-UID/04708 of the CONSTRUCT Instituto de I&D em Estruturas e Construções-funded by Fundação para a Ciência e a Tecnologia, I.P./ MCTES through the national funds. Project PTDC/ECI-EGC/3352/2021, funded by national funds through FCT/ MCTES; Individual Grant no. 2022.00898. CEECIND (Scientific Employment Stimulus-5th Edition) provided by FCT (https://doi.org/10.54499/2022.00898.CEECIND/ CP1733/CT0005).

Funders	Funder number
CONSTRUCT Instituto de I&D
Fundação para a Ciência e a Tecnologia	PTDC/ECI-EST/1481/2021
Ministério da Ciência, Tecnologia e Ensino Superior	PTDC/ECI-EGC/3352/2021, 2022.00898

Keywords

critical speed
ground reinforcement
numerical simulations
railway traffic

Access to Document

10.1007/978-3-031-96106-9_68

Cite this

dos Santos, N. C., Colaço, A., Soares, P., Castanheira-Pinto, A., Costa, P. A., & Kaynia, A. M. (2025). Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment. In Á. Cunha, & E. Caetano (Eds.), Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2 (pp. 660-668). (Lecture Notes in Civil Engineering; Vol. 675 LNCE). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-031-96106-9_68

dos Santos, N. Correia ; Colaço, A. ; Soares, P. et al. / Dynamic Behaviour of Track-Ground System : The Impact of Ground Treatment. Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2. editor / Álvaro Cunha ; Elsa Caetano. Springer Science and Business Media Deutschland GmbH, 2025. pp. 660-668 (Lecture Notes in Civil Engineering).

@inproceedings{2036d96a710c436aba3f9c0497d492c1,

title = "Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment",

abstract = "Dynamic amplification effects may occur when a railway line, with high operation speed, is in a soft soil. In these scenarios, it is necessary to analyse the impact the critical speed phenomenon on safety and operational costs of the railway track. A ground treatment may contribute to an improvement of the system dynamic behaviour. This treatment may be based on replacing a portion of the natural soil with stiffer materials or by employing grouting. The current paper presents a numerical study that shows the improvement of the dynamic behaviour of the ground-track system obtained by means of the soil reinforcement. This study also evidences that localized ground reinforcement below the track yields a response similar to extending the reinforcement over a larger area. This conclusion is particularly interesting for engineering practice and for numerical/semi-analytical analysis. The definition of the critical speed as the value that induces larger amplification due to the passage of a single load is a conservative approach. Finally, it was possible to confirm that an approach based on the calculation of the dispersion curves provides an adequate estimation of the system{\textquoteright}s critical speed.",

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note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.; 11th International Conference on Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 ; Conference date: 02-07-2025 Through 04-07-2025",

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dos Santos, NC, Colaço, A, Soares, P, Castanheira-Pinto, A, Costa, PA & Kaynia, AM 2025, Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment. in Á Cunha & E Caetano (eds), Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2. Lecture Notes in Civil Engineering, vol. 675 LNCE, Springer Science and Business Media Deutschland GmbH, pp. 660-668, 11th International Conference on Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025, Porto, Portugal, 2/07/25. https://doi.org/10.1007/978-3-031-96106-9_68

Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment. / dos Santos, N. Correia; Colaço, A.; Soares, P. et al.
Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2. ed. / Álvaro Cunha; Elsa Caetano. Springer Science and Business Media Deutschland GmbH, 2025. p. 660-668 (Lecture Notes in Civil Engineering; Vol. 675 LNCE).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Dynamic Behaviour of Track-Ground System

T2 - 11th International Conference on Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025

AU - dos Santos, N. Correia

AU - Colaço, A.

AU - Soares, P.

AU - Castanheira-Pinto, A.

AU - Costa, P. Alves

AU - Kaynia, A. M.

PY - 2025

Y1 - 2025

N2 - Dynamic amplification effects may occur when a railway line, with high operation speed, is in a soft soil. In these scenarios, it is necessary to analyse the impact the critical speed phenomenon on safety and operational costs of the railway track. A ground treatment may contribute to an improvement of the system dynamic behaviour. This treatment may be based on replacing a portion of the natural soil with stiffer materials or by employing grouting. The current paper presents a numerical study that shows the improvement of the dynamic behaviour of the ground-track system obtained by means of the soil reinforcement. This study also evidences that localized ground reinforcement below the track yields a response similar to extending the reinforcement over a larger area. This conclusion is particularly interesting for engineering practice and for numerical/semi-analytical analysis. The definition of the critical speed as the value that induces larger amplification due to the passage of a single load is a conservative approach. Finally, it was possible to confirm that an approach based on the calculation of the dispersion curves provides an adequate estimation of the system’s critical speed.

AB - Dynamic amplification effects may occur when a railway line, with high operation speed, is in a soft soil. In these scenarios, it is necessary to analyse the impact the critical speed phenomenon on safety and operational costs of the railway track. A ground treatment may contribute to an improvement of the system dynamic behaviour. This treatment may be based on replacing a portion of the natural soil with stiffer materials or by employing grouting. The current paper presents a numerical study that shows the improvement of the dynamic behaviour of the ground-track system obtained by means of the soil reinforcement. This study also evidences that localized ground reinforcement below the track yields a response similar to extending the reinforcement over a larger area. This conclusion is particularly interesting for engineering practice and for numerical/semi-analytical analysis. The definition of the critical speed as the value that induces larger amplification due to the passage of a single load is a conservative approach. Finally, it was possible to confirm that an approach based on the calculation of the dispersion curves provides an adequate estimation of the system’s critical speed.

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A2 - Caetano, Elsa

PB - Springer Science and Business Media Deutschland GmbH

Y2 - 2 July 2025 through 4 July 2025

ER -

dos Santos NC, Colaço A, Soares P, Castanheira-Pinto A, Costa PA, Kaynia AM. Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment. In Cunha Á, Caetano E, editors, Experimental Vibration Analysis for Civil Engineering Structures, EVACES 2025 - Volume 2. Springer Science and Business Media Deutschland GmbH. 2025. p. 660-668. (Lecture Notes in Civil Engineering). doi: 10.1007/978-3-031-96106-9_68

Dynamic Behaviour of Track-Ground System: The Impact of Ground Treatment

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Keywords

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