Details
| Original language | English |
|---|---|
| Pages (from-to) | 1825-1838 |
| Number of pages | 14 |
| Journal | Canadian geotechnical journal |
| Volume | 58 |
| Issue number | 12 |
| Early online date | 2 Feb 2021 |
| Publication status | Published - 2021 |
Abstract
Estimating pile group efficiency for open-ended steel piles in small group arrangements is a challenging task for designers. This paper reports on the large-scale experimental campaign performed for the BorWin gamma offshore converter platform, which involved single piles and two-pile group systems on a scale of 1:10. The experimental works included installation, dynamic end-of-driving tests, dynamic restrike tests, and static load tests of a single pile and a pair of two-pile groups in densely compacted, artificially prepared homogeneous sand. The cone penetration test (CPT) profiles and the blow counts confirmed that the foundation systems are comparable to each other. The experimental results of the single pile system were compared with conventional design methods. Such comparison indicated that CPT-based methods and load-transfer methods are applicable at the considered model scale. The bearing capacity prediction obtained via the Case Pile Wave Analysis Program (CAPWAP) method is conservative with respect to the static capacity. A consistent setup effect can be detected by analyzing the complete dynamic loading session. The pile group efficiency for the given foundation system was found to be less than 1.0 at both very small and very large soil strains, while it equaled 1.0 at failure.
Keywords
- Large-scale model tests, Offshore platform, Pile group
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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In: Canadian geotechnical journal, Vol. 58, No. 12, 2021, p. 1825-1838.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Large-scale model tests of a single pile and two-pile groups for an offshore platform in sand
AU - Foglia, Aligi
AU - Abdel-Rahman, Khalid
AU - Wisotzki, Elmar
AU - Quiroz, Tulio
AU - Achmus, Martin
PY - 2021
Y1 - 2021
N2 - Estimating pile group efficiency for open-ended steel piles in small group arrangements is a challenging task for designers. This paper reports on the large-scale experimental campaign performed for the BorWin gamma offshore converter platform, which involved single piles and two-pile group systems on a scale of 1:10. The experimental works included installation, dynamic end-of-driving tests, dynamic restrike tests, and static load tests of a single pile and a pair of two-pile groups in densely compacted, artificially prepared homogeneous sand. The cone penetration test (CPT) profiles and the blow counts confirmed that the foundation systems are comparable to each other. The experimental results of the single pile system were compared with conventional design methods. Such comparison indicated that CPT-based methods and load-transfer methods are applicable at the considered model scale. The bearing capacity prediction obtained via the Case Pile Wave Analysis Program (CAPWAP) method is conservative with respect to the static capacity. A consistent setup effect can be detected by analyzing the complete dynamic loading session. The pile group efficiency for the given foundation system was found to be less than 1.0 at both very small and very large soil strains, while it equaled 1.0 at failure.
AB - Estimating pile group efficiency for open-ended steel piles in small group arrangements is a challenging task for designers. This paper reports on the large-scale experimental campaign performed for the BorWin gamma offshore converter platform, which involved single piles and two-pile group systems on a scale of 1:10. The experimental works included installation, dynamic end-of-driving tests, dynamic restrike tests, and static load tests of a single pile and a pair of two-pile groups in densely compacted, artificially prepared homogeneous sand. The cone penetration test (CPT) profiles and the blow counts confirmed that the foundation systems are comparable to each other. The experimental results of the single pile system were compared with conventional design methods. Such comparison indicated that CPT-based methods and load-transfer methods are applicable at the considered model scale. The bearing capacity prediction obtained via the Case Pile Wave Analysis Program (CAPWAP) method is conservative with respect to the static capacity. A consistent setup effect can be detected by analyzing the complete dynamic loading session. The pile group efficiency for the given foundation system was found to be less than 1.0 at both very small and very large soil strains, while it equaled 1.0 at failure.
KW - Large-scale model tests
KW - Offshore platform
KW - Pile group
UR - http://www.scopus.com/inward/record.url?scp=85120887540&partnerID=8YFLogxK
U2 - 10.1139/cgj-2020-0224
DO - 10.1139/cgj-2020-0224
M3 - Article
AN - SCOPUS:85120887540
VL - 58
SP - 1825
EP - 1838
JO - Canadian geotechnical journal
JF - Canadian geotechnical journal
SN - 0008-3674
IS - 12
ER -