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Title: | Arching development above active trapdoor : insight from multi-scale analysis using FEM-SPH | Authors: | Xiong, H Qiu, Y Shi, X Wang, X Chen, X |
Issue Date: | May-2024 | Source: | Acta geotechnica, May 2024, v. 19, no. 5, p. 2419-2443 | Abstract: | Underground excavation is usually accompanied by complex soil-structure interaction problems in practical engineering. This paper develops a novel multi-scale approach for investigating the soil arching effect through trapdoor tests. This approach adopts the finite element method (FEM) and smoothed particle hydrodynamics (SPH) method to handle the particle-rigid body interaction in the trapdoor tests, incorporating a micromechanical 3D-H model to derive the nonlinear material response required by the SPH method. The variation of the earth pressure on the trapdoor in simulations exhibits good agreement with those of the experiments. Extensive parametric analyzes are performed to assess the effects of soil height and inter-particle friction angle on the evolution of load transfer and soil deformation. Three deformation patterns are observed under different buried conditions, including the trapezoid, the triangle, and the equal settlement pattern. Results indicate that the planes of equal settlement develop progressively with the trapdoor movement and then enter the range of experimentally observed values. Additionally, three failure mechanisms are identified that correspond to the three deformation patterns. Due to the advantages of the micromechanical model, mesoscale behavior is captured. The anisotropy of stress distribution in the plastic region is found during the arching process. | Keywords: | Arching effect Micromechanics Multi-scale approach Trapdoor test Underground excavation |
Publisher: | Springer | Journal: | Acta geotechnica | ISSN: | 1861-1125 | EISSN: | 1861-1133 | DOI: | 10.1007/s11440-023-02148-0 | Rights: | © The Author(s) 2024 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The following publication Xiong, H., Qiu, Y., Shi, X. et al. Arching development above active trapdoor: insight from multi-scale analysis using FEM–SPH. Acta Geotech. 19, 2419–2443 (2024) is available at https://doi.org/10.1007/s11440-023-02148-0. |
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