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Title: | Large strain consolidation model for very soft soils with prefabricated horizontal drains considering nonlinear compression and creep | Authors: | Li, PL Song, DB Yin, ZY Yin, JH |
Issue Date: | Mar-2025 | Source: | Acta geotechnica, Mar. 2025, v. 20, no. 3, p. 1431-1453 | Abstract: | The use of horizontal drains assisted by vacuum loading is an effective method for speeding up the consolidation of dredged soil slurry. However, few studies developed models for the large strain consolidation of clayey slurry with prefabricated horizontal drains (PHDs) under self-weight and vacuum loading considering the effects of nonlinear compression and creep. This study introduces a PHD-assisted finite strain consolidation model considering nonlinear compression and limited creep by incorporating an improved elasto-viscoplastic constitutive equation. Firstly, the governing equations for the consolidation of very soft soil with PHDs were derived and solved by the finite-difference method. Subsequently, the proposed consolidation model was verified by comparing the calculations with the finite element solutions, a laboratory model test, and a field trial performed in Hong Kong. Good agreement with the numerical solutions and measured results indicates that the proposed model can capture the consolidation features with PHD combining staged filling and time-dependent vacuum loading. Then, the proposed model was used to estimate a self-weight consolidation test and field test in Japan to show the performance of the proposed model. Finally, parametric studies were conducted to explore the influence of nonlinear compression and creep on the consolidation of soft soil with PHDs. | Keywords: | Creep limit Finite strain Nonlinear compression Prefabricated horizontal drain Soft soil Vacuum consolidation |
Publisher: | Springer | Journal: | Acta geotechnica | ISSN: | 1861-1125 | EISSN: | 1861-1133 | DOI: | 10.1007/s11440-024-02452-3 | 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 Li, PL., Song, DB., Yin, ZY. et al. Large strain consolidation model for very soft soils with prefabricated horizontal drains considering nonlinear compression and creep. Acta Geotech. 20(3), 1431–1453 (2025) is available at 10.1007/s11440-024-02452-3. |
Appears in Collections: | Journal/Magazine Article |
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