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 language | English |
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Title of host publication | Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 |
Publication date | 2011 |
Pages | 692-698 |
Publication status | Published - 2011 |
Event | 8th International Conference on Structural Dynamics - Leuven, Belgium Duration: 4 Jul 2011 → 6 Jul 2011 Conference number: 8 http://www.eurodyn2011.org/ |
Conference
Conference | 8th International Conference on Structural Dynamics |
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Number | 8 |
Country/Territory | Belgium |
City | Leuven |
Period | 04/07/2011 → 06/07/2011 |
Internet address |
Keywords
- Geosynthetics
- Ground vibration
- Dynamic response
- Numerical modelling
- High–speed train
- Soil conditions
- Time-history analysis
- Reinforced soil