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Title: | New simple method for calculating large-strain consolidation settlement of layered soft soils with horizontal drains and vacuum preloading with comparison to test data | Authors: | Chen, ZJ Li, PL Li, A Yin, JH Song, DB |
Issue Date: | 2024 | Source: | Geotextiles and geomembranes, Available online 5 April 2024, In Press, Corrected Proof, https://doi.org/10.1016/j.geotexmem.2024.03.011 | Abstract: | Prefabricated horizontal drains and vacuum preloading have advantages in the consolidation of ultra-soft dredged sludge and soils for maintenance dredging, reclamation, and ground improvement in coastal regions. While laboratory tests and field trial projects have been reported, a convenient analysis and design method is still unavailable. This study proposes a new simple method for the settlement analysis of soft soils considering horizontal drains, vacuum preloading, creep, and large-strain effects. A unified equation is constructed to account for various layouts of horizontal drains in consolidation. A new explicit method is developed to consider the large-strain deformation with the nonlinear evolution of permeability and compressibility of ultra-soft soils under vacuum preloading. The viscous compression is taken into account using a simplified Hypothesis B method. The proposed solution also facilitates convenient consideration of multiple layers of soils and drains subjected to staged loading. The proposed method is examined by a series of physical model tests with different horizontal drain dimensions. Finally, the method is applied in the analysis of two well-documented field cases in Hong Kong and Japan, which confirms its effectiveness and accuracy. | Keywords: | Consolidation Horizontal drains Large-strain Simple method Soft soils |
Publisher: | Elsevier Ltd | Journal: | Geotextiles and geomembranes | ISSN: | 0266-1144 | EISSN: | 1879-3584 | DOI: | 10.1016/j.geotexmem.2024.03.011 | Rights: | © 2024 Published by Elsevier Ltd. © 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Chen, Z.-j., Li, P.-l., Li, A., Yin, J.-h., & Song, D.-b. (2024). New simple method for calculating large-strain consolidation settlement of layered soft soils with horizontal drains and vacuum preloading with comparison to test data. Geotextiles and Geomembranes is available at https://doi.org/10.1016/j.geotexmem.2024.03.011. |
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