Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels
Oil and gas exploration is increasingly moving to deepwater locations to meet the increasing energy demands. In this environment, floating structures with suction pile foundations are commonly used because their the cost-effectiveness. Some studies have been conducted to examine the behavior of suct...
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| Format: | Article |
| Language: | English |
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Universitas Indonesia
2015-04-01
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| Series: | International Journal of Technology |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/1354 |
| _version_ | 1797970408597618688 |
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| author | Irfan Budiman Iwan Soedigdo Widjojo A. Prakoso |
| author_facet | Irfan Budiman Iwan Soedigdo Widjojo A. Prakoso |
| author_sort | Irfan Budiman |
| collection | DOAJ |
| description | Oil and gas exploration is increasingly moving to deepwater locations to meet the increasing energy demands. In this environment, floating structures with suction pile foundations are commonly used because their the cost-effectiveness. Some studies have been conducted to examine the behavior of suction piles in clays, but the clay conditions considered are typically normally consolidated and lightly overconsolidated. In this paper, the behavior of suction piles in underconsolidated clays and underconsolidated-normally consolidated clays adopted from actual deepwater soil conditions. The evaluation was performed using geotechnical 3D finite element software Plaxis. Suction piles with two different aspect ratios (L/D = 2 and 6) were considered, and the focus was on the effect of load angles (0? to 90?) and the effects of padeye position (0.5 L to 0.9 L). For short piles, the load angles had a relatively insignificant effect on the overall ultimate resistance, while for long piles, the angles affected the overall resistance considerably with a decrease in resistance up to about 50 percent. This different behavior could be explained from the observed pile deformation patterns. The padeye positions affected the pile resistances significantly as well with a decrease in resistance up to about 30 percent. Nevertheless, it can be concluded that the overall behavior of suction piles in a combined clay conditions is practically similar to that of piles in normally consolidated and overconsolidated clays. |
| first_indexed | 2024-04-11T03:17:25Z |
| format | Article |
| id | doaj.art-a7c60f963bd54157953488a97a1de04d |
| institution | Directory Open Access Journal |
| issn | 2086-9614 2087-2100 |
| language | English |
| last_indexed | 2024-04-11T03:17:25Z |
| publishDate | 2015-04-01 |
| publisher | Universitas Indonesia |
| record_format | Article |
| series | International Journal of Technology |
| spelling | doaj.art-a7c60f963bd54157953488a97a1de04d2023-01-02T10:12:31ZengUniversitas IndonesiaInternational Journal of Technology2086-96142087-21002015-04-016225426310.14716/ijtech.v6i2.13541354Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater LevelsIrfan Budiman0Iwan Soedigdo1Widjojo A. Prakoso2PT. Rekadaya, Jakarta, IndonesiaDepartment of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok 16424, IndonesiaDepartment of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok 16424, IndonesiaOil and gas exploration is increasingly moving to deepwater locations to meet the increasing energy demands. In this environment, floating structures with suction pile foundations are commonly used because their the cost-effectiveness. Some studies have been conducted to examine the behavior of suction piles in clays, but the clay conditions considered are typically normally consolidated and lightly overconsolidated. In this paper, the behavior of suction piles in underconsolidated clays and underconsolidated-normally consolidated clays adopted from actual deepwater soil conditions. The evaluation was performed using geotechnical 3D finite element software Plaxis. Suction piles with two different aspect ratios (L/D = 2 and 6) were considered, and the focus was on the effect of load angles (0? to 90?) and the effects of padeye position (0.5 L to 0.9 L). For short piles, the load angles had a relatively insignificant effect on the overall ultimate resistance, while for long piles, the angles affected the overall resistance considerably with a decrease in resistance up to about 50 percent. This different behavior could be explained from the observed pile deformation patterns. The padeye positions affected the pile resistances significantly as well with a decrease in resistance up to about 30 percent. Nevertheless, it can be concluded that the overall behavior of suction piles in a combined clay conditions is practically similar to that of piles in normally consolidated and overconsolidated clays.http://ijtech.eng.ui.ac.id/article/view/1354 |
| spellingShingle | Irfan Budiman Iwan Soedigdo Widjojo A. Prakoso Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels International Journal of Technology |
| title | Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels |
| title_full | Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels |
| title_fullStr | Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels |
| title_full_unstemmed | Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels |
| title_short | Analysis of Suction Piles for Mooring Floating Structure Foundations in Clay Soil at Deepwater Levels |
| title_sort | analysis of suction piles for mooring floating structure foundations in clay soil at deepwater levels |
| url | http://ijtech.eng.ui.ac.id/article/view/1354 |
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