Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geotechnical and Geophysical Railway Embankment Auscultation
https://orcid.org/http://orcid.org/0000-0002-6780-6864
As part of the understanding of the phenomena affecting tracks geometry on the Northern Europe high-speed line (LGV-Nord), a study was carried out on an area with occasional maintenance efforts. The goal is to identify the causes of structural disorders on railway embankment (RE). To better understand the origins of these issues, geotechnical characterization and bender elements (BE) tests were performed in the laboratory on soils collected on the field. Measurements of water content, density, and Atterberg limits cannot explain the anomalies observed along the tracks. However, when it comes to mechanical properties and more precisely to shear wave velocities (VS), we can clearly see strong contrasts between areas where the phenomena were observed and where it was not. Thus, VS obtained with BE tests seems to be a good indicator of the quality of soils constituting the RE. At the site scale, surface-wave methods were identified as a possible tool to estimate the mechanical properties of the RE. In this context, we dimensioned and designed specific acquisition setups. To estimate 1D profiles of shear wave velocities, we performed many tests to show the robustness of this method, when inversions are constrained by railway a priori. Those tests allowed us to determine the geometry of the platforms and to characterize the VS of the supporting soil. These results show a difference between the sections of RE with disorders and those without. The reliability of these results is also highlighted since they coincide with geotechnical data.
Geotechnical and Geophysical Railway Embankment Auscultation
https://orcid.org/http://orcid.org/0000-0002-6780-6864
As part of the understanding of the phenomena affecting tracks geometry on the Northern Europe high-speed line (LGV-Nord), a study was carried out on an area with occasional maintenance efforts. The goal is to identify the causes of structural disorders on railway embankment (RE). To better understand the origins of these issues, geotechnical characterization and bender elements (BE) tests were performed in the laboratory on soils collected on the field. Measurements of water content, density, and Atterberg limits cannot explain the anomalies observed along the tracks. However, when it comes to mechanical properties and more precisely to shear wave velocities (VS), we can clearly see strong contrasts between areas where the phenomena were observed and where it was not. Thus, VS obtained with BE tests seems to be a good indicator of the quality of soils constituting the RE. At the site scale, surface-wave methods were identified as a possible tool to estimate the mechanical properties of the RE. In this context, we dimensioned and designed specific acquisition setups. To estimate 1D profiles of shear wave velocities, we performed many tests to show the robustness of this method, when inversions are constrained by railway a priori. Those tests allowed us to determine the geometry of the platforms and to characterize the VS of the supporting soil. These results show a difference between the sections of RE with disorders and those without. The reliability of these results is also highlighted since they coincide with geotechnical data.
Geotechnical and Geophysical Railway Embankment Auscultation
https://orcid.org/http://orcid.org/0000-0002-6780-6864
As part of the understanding of the phenomena affecting tracks geometry on the Northern Europe high-speed line (LGV-Nord), a study was carried out on an area with occasional maintenance efforts. The goal is to identify the causes of structural disorders on railway embankment (RE). To better understand the origins of these issues, geotechnical characterization and bender elements (BE) tests were performed in the laboratory on soils collected on the field. Measurements of water content, density, and Atterberg limits cannot explain the anomalies observed along the tracks. However, when it comes to mechanical properties and more precisely to shear wave velocities (VS), we can clearly see strong contrasts between areas where the phenomena were observed and where it was not. Thus, VS obtained with BE tests seems to be a good indicator of the quality of soils constituting the RE. At the site scale, surface-wave methods were identified as a possible tool to estimate the mechanical properties of the RE. In this context, we dimensioned and designed specific acquisition setups. To estimate 1D profiles of shear wave velocities, we performed many tests to show the robustness of this method, when inversions are constrained by railway a priori. Those tests allowed us to determine the geometry of the platforms and to characterize the VS of the supporting soil. These results show a difference between the sections of RE with disorders and those without. The reliability of these results is also highlighted since they coincide with geotechnical data.
Geotechnical and Geophysical Railway Embankment Auscultation
Lecture Notes in Civil Engineering
Tutumluer, Erol (Herausgeber:in) / Nazarian, Soheil (Herausgeber:in) / Al-Qadi, Imad (Herausgeber:in) / Qamhia, Issam I.A. (Herausgeber:in) / Dhemaied, Amine (Autor:in) / Heraibi, Robin (Autor:in) / Dangeard, Marine (Autor:in) / Bodet, Ludovic (Autor:in)
05.08.2021
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Geotechnical and Geophysical Railway Embankment Auscultation
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Geotechnical auscultation of a French conventional railway track-bed for maintenance purposes
| British Library Online Contents | 2016
Geotechnical auscultation of a French conventional railway track-bed for maintenance purposes
| British Library Online Contents | 2016
| Europäisches Patentamt | 2021