Abstract
Fluked (aka finned) torpedo anchors are increasingly being used for tethering of offshore structures. In this study, the effect of the torpedo fluke length on penetration and pullout capacity was explored. Three model torpedoes of equal mass having different fluke shapes were installed in a synthetic transparent soil surrogate used to model soft clay. Images acquired during embedment and extraction provided data for digital image correlation (DIC), from which time-resolved data for anchor movement and soil displacements were obtained. Pullout loads were also measured. The affected zones around the anchors during penetration and pullout were found to be approximately four times the shaft diameter, and were larger where flukes were present. Increasing the fluke dimensions decreased penetration but increased peak pullout loads. Results suggest that the area of the leading and trailing edges of the flukes is responsible for both decreased penetration and elevated pullout capacity for fluked torpedoes.
| Original language | English (US) |
|---|---|
| Title of host publication | Geotechnical Special Publication |
| Editors | Joseph T. Coe, Christopher L. Meehan, Sanjeev Kumar, Miguel A. Pando |
| Publisher | American Society of Civil Engineers (ASCE) |
| Pages | 387-397 |
| Number of pages | 11 |
| Edition | GSP 307 |
| ISBN (Electronic) | 9780784482070, 9780784482087, 9780784482094, 9780784482100, 9780784482117, 9780784482124, 9780784482131, 9780784482148, 9780784482155, 9780784482162 |
| DOIs | |
| State | Published - Jan 1 2019 |
| Event | 8th International Conference on Case Histories in Geotechnical Engineering: Foundations, Geo-Congress 2019 - Philadelphia, United States Duration: Mar 24 2019 → Mar 27 2019 |
Publication series
| Name | Geotechnical Special Publication |
|---|---|
| Number | GSP 307 |
| Volume | 2019-March |
| ISSN (Print) | 0895-0563 |
Conference
| Conference | 8th International Conference on Case Histories in Geotechnical Engineering: Foundations, Geo-Congress 2019 |
|---|---|
| Country | United States |
| City | Philadelphia |
| Period | 3/24/19 → 3/27/19 |
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ASJC Scopus subject areas
- Civil and Structural Engineering
- Architecture
- Building and Construction
- Geotechnical Engineering and Engineering Geology
Cite this
Visualization of torpedo pile penetration and pullout in transparent synthetic soil representative of soft marine clays. / Ads, Abdelaziz; Omidvar, Mehdi; Bless, Stephan; Iskander, Magued.
Geotechnical Special Publication. ed. / Joseph T. Coe; Christopher L. Meehan; Sanjeev Kumar; Miguel A. Pando. GSP 307. ed. American Society of Civil Engineers (ASCE), 2019. p. 387-397 (Geotechnical Special Publication; Vol. 2019-March, No. GSP 307).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Visualization of torpedo pile penetration and pullout in transparent synthetic soil representative of soft marine clays
AU - Ads, Abdelaziz
AU - Omidvar, Mehdi
AU - Bless, Stephan
AU - Iskander, Magued
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Fluked (aka finned) torpedo anchors are increasingly being used for tethering of offshore structures. In this study, the effect of the torpedo fluke length on penetration and pullout capacity was explored. Three model torpedoes of equal mass having different fluke shapes were installed in a synthetic transparent soil surrogate used to model soft clay. Images acquired during embedment and extraction provided data for digital image correlation (DIC), from which time-resolved data for anchor movement and soil displacements were obtained. Pullout loads were also measured. The affected zones around the anchors during penetration and pullout were found to be approximately four times the shaft diameter, and were larger where flukes were present. Increasing the fluke dimensions decreased penetration but increased peak pullout loads. Results suggest that the area of the leading and trailing edges of the flukes is responsible for both decreased penetration and elevated pullout capacity for fluked torpedoes.
AB - Fluked (aka finned) torpedo anchors are increasingly being used for tethering of offshore structures. In this study, the effect of the torpedo fluke length on penetration and pullout capacity was explored. Three model torpedoes of equal mass having different fluke shapes were installed in a synthetic transparent soil surrogate used to model soft clay. Images acquired during embedment and extraction provided data for digital image correlation (DIC), from which time-resolved data for anchor movement and soil displacements were obtained. Pullout loads were also measured. The affected zones around the anchors during penetration and pullout were found to be approximately four times the shaft diameter, and were larger where flukes were present. Increasing the fluke dimensions decreased penetration but increased peak pullout loads. Results suggest that the area of the leading and trailing edges of the flukes is responsible for both decreased penetration and elevated pullout capacity for fluked torpedoes.
UR - http://www.scopus.com/inward/record.url?scp=85063473958&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063473958&partnerID=8YFLogxK
U2 - 10.1061/9780784482094.035
DO - 10.1061/9780784482094.035
M3 - Conference contribution
T3 - Geotechnical Special Publication
SP - 387
EP - 397
BT - Geotechnical Special Publication
A2 - Coe, Joseph T.
A2 - Meehan, Christopher L.
A2 - Kumar, Sanjeev
A2 - Pando, Miguel A.
PB - American Society of Civil Engineers (ASCE)
ER -