| Issue |
E3S Web of Conf.
Volume 544, 2024
8th International Symposium on Deformation Characteristics of Geomaterials (IS-Porto 2023)
|
|
|---|---|---|
| Article Number | 10001 | |
| Number of page(s) | 6 | |
| Section | Behaviour, Characterization and Modelling of Various Geomaterials and Interfaces - Cyclic and Dynamic Behaviour | |
| DOI | https://doi.org/10.1051/e3sconf/202454410001 | |
| Published online | 02 July 2024 | |
Determination of hypoplastic parameters for a typical gravel backfill material of railway bridges
1 Graz University of Technology, Institute of Soil Mechanics, Foundation Engineering and Computational Geotechnics, Rechbauerstrase 12, 8010 Graz (Austria)
2 DB Netz AG, Richelstrase 3, 80634 Munchen (Germany)
3 Keller Grundbau GmbH, Schwarzwaldstrase 1, 77871 Renchen
4 former: Karlsruhe Institute of Technology (KIT), Institute of Soil Mechanics and Rock Mechanics, Engler-Bunte-Ring 14, 76131 Karlsruhe
5 Baugrund Dresden Ingenieurgesellschaft mbH, Kleiststrase 10a, 01129 Dresden
* Corresponding author: alexander.stastny@deutschebahn.com
Laboratory test programs on gravel are rare due to the maximum grain size of the material. In this paper an experimental program with triaxial tests under cyclic loading and oedometric tests on highly compacted gravel specimens, representative for bridge backfills materials, is summarized. It is used to calibrate a hypoplastic constitutive model, which includes an extension for intergranular strain to account for the cyclic loading behaviour. So far calibrated parameter sets of this soil model are scarce in literature, especially for coarse grained materials. The calibrated parameter set can be used in numerical studies, e. g. on the cyclic soil structure interaction of integral railway bridges.
Key words: cyclic loading / triaxial tests / gravel material / hypoplasticity with intergranular strain
© The Authors, published by EDP Sciences, 2024
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