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A. Castanheira-Pinto¹, A. Colaco¹, J. Fernandez Ruiz², P. Alves Costa¹, L. Godinho³

¹Construct-FEUP University of Porto, Porto, Portugal
²University of La Coruna, Department of Civil Engineering La Coruna, Spain
³University of Coimbra, ISISE, Department of Civil Engineering, Portugal

doi:10.4203/ccc.1.3.2

A. Castanheira-Pinto, A. Colaco, J. Fernandez Ruiz, P. Alves Costa, L. Godinho, "Ground reinforcement design to enhance critical speed through a simplified approach", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 3.2, 2022, doi:10.4203/ccc.1.3.2

Keywords: traffic-induced vibrations, critical velocity, ground reinforcement, simplified methodology.

Abstract

In recent years, there have been significant advances in the railway sector, with a substantial increase in train speed, resulting in new challenges for the technical community in terms of infrastructure performance. When the supporting soil of the railway track is soft, the train speed can approach the speed of wave propagation in the track-ground system, giving rise to the so-called critical speed effect. This effect is characterized by the great amplification of the track response with dramatic consequences in terms of safety, ground-borne vibrations and maintenance costs. This well-known issue can be mitigated in several ways, one of them based on the reinforcement of the soil with columns. Bearing that in mind, the present paper aims to study the enhancement in the critical speed of the railway system achieved by a soil reinforcement with jet grouting columns, for a homogeneous and layered ground. Furthermore, a simplified methodology capable of accurately predicting the critical speed for reinforced grounds is proposed.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 3.2 Ground reinforcement design to enhance critical speed through a simplified approach A. Castanheira-Pinto¹, A. Colaco¹, J. Fernandez Ruiz², P. Alves Costa¹, L. Godinho³ ¹Construct-FEUP University of Porto, Porto, Portugal ²University of La Coruna, Department of Civil Engineering La Coruna, Spain ³University of Coimbra, ISISE, Department of Civil Engineering, Portugal doi:10.4203/ccc.1.3.2 Full Bibliographic Reference for this paper A. Castanheira-Pinto, A. Colaco, J. Fernandez Ruiz, P. Alves Costa, L. Godinho, "Ground reinforcement design to enhance critical speed through a simplified approach", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 3.2, 2022, doi:10.4203/ccc.1.3.2 Keywords: traffic-induced vibrations, critical velocity, ground reinforcement, simplified methodology. Abstract In recent years, there have been significant advances in the railway sector, with a substantial increase in train speed, resulting in new challenges for the technical community in terms of infrastructure performance. When the supporting soil of the railway track is soft, the train speed can approach the speed of wave propagation in the track-ground system, giving rise to the so-called critical speed effect. This effect is characterized by the great amplification of the track response with dramatic consequences in terms of safety, ground-borne vibrations and maintenance costs. This well-known issue can be mitigated in several ways, one of them based on the reinforcement of the soil with columns. Bearing that in mind, the present paper aims to study the enhancement in the critical speed of the railway system achieved by a soil reinforcement with jet grouting columns, for a homogeneous and layered ground. Furthermore, a simplified methodology capable of accurately predicting the critical speed for reinforced grounds is proposed. download the full-text of this paper (PDF, 7 pages, 757 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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