Extraction behavior of a modified suction caisson by reversely pumping water in layered soils.
Saved in:
| Title: | Extraction behavior of a modified suction caisson by reversely pumping water in layered soils. |
|---|---|
| Authors: | Li, Dayong1 (AUTHOR), Sang, Zhiyuan1 (AUTHOR), Zhang, Yukun2 (AUTHOR) philc007@163.com |
| Source: | Marine Georesources & Geotechnology. Nov2025, Vol. 43 Issue 11, p2159-2171. 13p. |
| Subjects: | Offshore structures, Fluid pressure, Simulation methods & models, Sediments |
| Abstract: | The suction caisson can be extracted for reuse by reversely pumping water after the decommissioning of offshore structures. Model tests were conducted to explore the modified suction caisson (MSC) extraction behavior by reversely pumping water. The results indicate that the MSC exhibits higher maximum over-pressure (MOP) but achieves smaller final extraction displacement (FED) in layered soils than in homogeneous soils. The MOP of the MSC in the clay over sand (t = 0.375, t is the ratio of the upper layer thickness to the total soil thickness) is 5.1, 7.6, and 4.5 times greater than that of the clay, sand, and sand over clay (t = 0.375), respectively. The FED of the MSC in the clay over sand (t = 0.375) is 71%, 60%, and 75% of the clay, sand, and sand over clay (t = 0.375), respectively. Furthermore, reversely pumping water into the internal caisson is better to achieve a higher FED in layered soils. In sand over clay, the MOP of the MSC decreases as t increases, while the FED initially decreases but then increases with t. In clay over sand, a specific upper clay thickness exists where the MSC results in the lowest FED. [ABSTRACT FROM AUTHOR] |
| Copyright of Marine Georesources & Geotechnology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | The suction caisson can be extracted for reuse by reversely pumping water after the decommissioning of offshore structures. Model tests were conducted to explore the modified suction caisson (MSC) extraction behavior by reversely pumping water. The results indicate that the MSC exhibits higher maximum over-pressure (MOP) but achieves smaller final extraction displacement (FED) in layered soils than in homogeneous soils. The MOP of the MSC in the clay over sand (t = 0.375, t is the ratio of the upper layer thickness to the total soil thickness) is 5.1, 7.6, and 4.5 times greater than that of the clay, sand, and sand over clay (t = 0.375), respectively. The FED of the MSC in the clay over sand (t = 0.375) is 71%, 60%, and 75% of the clay, sand, and sand over clay (t = 0.375), respectively. Furthermore, reversely pumping water into the internal caisson is better to achieve a higher FED in layered soils. In sand over clay, the MOP of the MSC decreases as t increases, while the FED initially decreases but then increases with t. In clay over sand, a specific upper clay thickness exists where the MSC results in the lowest FED. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 1064119X |
| DOI: | 10.1080/1064119X.2025.2452887 |
