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- Publisher Website: 10.1016/j.oceaneng.2023.113894
- Scopus: eid_2-s2.0-85148353656
- WOS: WOS:000944496300001
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Article: Theoretical analysis for thermal consolidation of marine sediments with depth variability subjected to time-dependent loading and heating
| Title | Theoretical analysis for thermal consolidation of marine sediments with depth variability subjected to time-dependent loading and heating |
|---|---|
| Authors | |
| Keywords | Analytical solution Marine sediments Thermal consolidation Time-dependent loading |
| Issue Date | 1-Apr-2023 |
| Publisher | Elsevier |
| Citation | Ocean Engineering, 2023, v. 273 How to Cite? |
| Abstract | Because the spatial distribution of energy is restricted, many energies geotechnics would build on marine sediments and the resulting thermal consolidation would pose an inevitable threat to the safety and stability of the project. In this study, a new governing equation for thermal consolidation of saturated marine sediments is proposed, by considering the depth variability of the marine sediment layer and the time-dependent external loading and temperature. The corresponding one-dimensional (1D) analytical solution for thermal consolidation of saturated marine sediments is derived. The average degree of consolidation (Ua) and the normalized excess pore water pressure (u/u0) in the saturated marine sediment layer at different depths and time durations are calculated and compared with the typical loading case. The results show that the loading rate of the external force only affects the amplitude of the excess pore water pressure u and does not affect the proportion of u with depth; the depth variability of bulk modulus has a greater effect on the distribution of Ua relative to the depth variability of permeability; the depth variability of permeability has a greater effect on the distribution of u/u0 with depth relative to the depth variability of bulk modulus when Ua = 50%; the assumption of instant thermal loading will lead to an over-assessment of Ua and u/u0. This study provides useful insights for energy geotechnical engineering design and practice. |
| Persistent Identifier | http://hdl.handle.net/10722/338475 |
| ISSN | 2023 Impact Factor: 4.6 2023 SCImago Journal Rankings: 1.214 |
| ISI Accession Number ID |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Hu, Ming-Jun | - |
| dc.contributor.author | Feng, Wei-Qiang | - |
| dc.contributor.author | Yang, Jun | - |
| dc.date.accessioned | 2024-03-11T10:29:11Z | - |
| dc.date.available | 2024-03-11T10:29:11Z | - |
| dc.date.issued | 2023-04-01 | - |
| dc.identifier.citation | Ocean Engineering, 2023, v. 273 | - |
| dc.identifier.issn | 0029-8018 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/338475 | - |
| dc.description.abstract | <p>Because the spatial distribution of energy is restricted, many energies <a href="https://www.sciencedirect.com/topics/engineering/geotechnics" title="Learn more about geotechnics from ScienceDirect's AI-generated Topic Pages">geotechnics</a> would build on <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/marine-sediment" title="Learn more about marine sediments from ScienceDirect's AI-generated Topic Pages">marine sediments</a> and the resulting thermal consolidation would pose an inevitable threat to the safety and stability of the project. In this study, a new governing equation for thermal consolidation of saturated <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/marine-sediment" title="Learn more about marine sediments from ScienceDirect's AI-generated Topic Pages">marine sediments</a> is proposed, by considering the depth variability of the marine sediment layer and the time-dependent external loading and temperature. The corresponding one-dimensional (1D) analytical solution for thermal consolidation of saturated marine sediments is derived. The average degree of consolidation (<em>U</em><sub><em>a</em></sub>) and the normalized excess <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/porewater" title="Learn more about pore water from ScienceDirect's AI-generated Topic Pages">pore water</a> pressure (<em>u</em>/<em>u</em><sub><em>0</em></sub>) in the saturated marine sediment layer at different depths and time durations are calculated and compared with the typical loading case. The results show that the loading rate of the external force only affects the amplitude of the excess <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/porewater" title="Learn more about pore water from ScienceDirect's AI-generated Topic Pages">pore water</a> pressure <em>u</em> and does not affect the proportion of <em>u</em> with depth; the depth variability of bulk modulus has a greater effect on the distribution of <em>U</em><sub><em>a</em></sub> relative to the depth variability of permeability; the depth variability of permeability has a greater effect on the distribution of <em>u/u</em><sub><em>0</em></sub> with depth relative to the depth variability of bulk modulus when <em>U</em><sub><em>a</em></sub> = 50%; the assumption of instant thermal loading will lead to an over-assessment of <em>U</em><sub><em>a</em></sub> and <em>u/u</em><sub><em>0</em></sub>. This study provides useful insights for energy <a href="https://www.sciencedirect.com/topics/engineering/geotechnical-engineering" title="Learn more about geotechnical engineering from ScienceDirect's AI-generated Topic Pages">geotechnical engineering</a> design and practice.<br></p> | - |
| dc.language | eng | - |
| dc.publisher | Elsevier | - |
| dc.relation.ispartof | Ocean Engineering | - |
| dc.subject | Analytical solution | - |
| dc.subject | Marine sediments | - |
| dc.subject | Thermal consolidation | - |
| dc.subject | Time-dependent loading | - |
| dc.title | Theoretical analysis for thermal consolidation of marine sediments with depth variability subjected to time-dependent loading and heating | - |
| dc.type | Article | - |
| dc.identifier.doi | 10.1016/j.oceaneng.2023.113894 | - |
| dc.identifier.scopus | eid_2-s2.0-85148353656 | - |
| dc.identifier.volume | 273 | - |
| dc.identifier.eissn | 1873-5258 | - |
| dc.identifier.isi | WOS:000944496300001 | - |
| dc.identifier.issnl | 0029-8018 | - |