Train induced vibrations in geosynthetic reinforced railway embankments

Varvara Zania, Ole Hededal, Anette Krogsbøll

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Abstract

High–speed trains may generate ground vibrations which cause undesirable environmental and economical impacts such as nuisance of the passengers, deflections along the rail, and possibly impairment of the stability of the embankments. The increase of the velocity of a moving load on homogeneous half space has been shown to generate dynamic amplification of the vertical displacements, in case the foundation soil consists of soft deposits (characterized by low Rayleigh wave velocities). Moreover, soft subsoil is also related to poor bearing capacity and therefore the design of embankments includes usually the application of stabilization techniques like geosynthetic reinforcement. Hence, in the current study the ground vibration, which is induced by a train passage in geosynthetic reinforced embankments, is investigated. In addition the impact of the soil conditions is examined. In order to accomplish the aforementioned research goals, dynamic finite element analyses of two-dimensional plane strain models have been performed. The results of the adopted approach, which is rather simplified, were compared with the corresponding results reported in the literature for a real scale experiment. The quite satisfactory agreement of the results provided an acceptable validation of the numerical procedure. This enabled the parametric investigation for analyzing the effect of the characteristic parameters of the subsoil conditions. The results indicate that the impact of the site conditions on the vertical surface displacements and velocities may be important.
Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
Publication date2011
Pages692-698
Publication statusPublished - 2011
Event8th International Conference on Structural Dynamics - Leuven, Belgium
Duration: 4 Jul 20116 Jul 2011
Conference number: 8
http://www.eurodyn2011.org/

Conference

Conference8th International Conference on Structural Dynamics
Number8
CountryBelgium
CityLeuven
Period04/07/201106/07/2011
Internet address

Keywords

  • Geosynthetics
  • Ground vibration
  • Dynamic response
  • Numerical modelling
  • High–speed train
  • Soil conditions
  • Time-history analysis
  • Reinforced soil

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