Published in: 3rd Iranian Conference on Geotechnical Engineering
COI code: GEOTEC03_122
Paper Language: English
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Authors Time Effects on the Axial Compression Bearing Capacity of Piles Driven in Offshore Clays of Persian Gulf – A Case StudyAmir Hossein Shamshirgaran - Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran
Babak Ebrahimian - Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran
Abstract:Nowadays, CPT based methods are vastly employed for predicting the bearing capacity of offshore piles. Previous experiences have shown that the pile capacity is time-dependent (setup and relaxation). Time effect on pile bearing capacity is extremely important which is missing in most CPT based prediction methods. Thus, the main objectives of this paper are: (1) comparing the pile capacity results of some popular CPT based methods with those obtained from Pile Dynamic Analyzer (PDA) and Case Pile Wave Analysis Program (CAPWAP) at End-Of-Drive (EOD) and Beginning -Of-Restrike (BOR) conditions periodically up to 9 months during pile installation; and (2) comparing the predictions of the most accurate CPT based methods to the Skov and Denver (1988) equation which has a semi-logarithmic time function form. For verification purposes, the critical focus of this study has been on employing the invaluable and very rare results of a test pile driven in offshore clays of South Pars field - Persian Gulf, Iran. The field results show that almost all CPT based methods estimate the pile capacity higher than those of EOD condition. However, they are generally close to the results of BOR condition as well as the Skov and Denver (1988) equation with 100-day time reference. In addition, comparing to the long-term predictions of CPT based methods, the set-up factor values proposed by NGI (2000) equation are the most precise ones against the CAPWAP results
Keywords:Offshore piles, Axial bearing capacity, CPT based methods, PDA test, Soil set-up
COI code: GEOTEC03_122
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Shamshirgaran, Amir Hossein & Babak Ebrahimian, 2018, Time Effects on the Axial Compression Bearing Capacity of Piles Driven in Offshore Clays of Persian Gulf – A Case Study, 3rd Iranian Conference on Geotechnical Engineering, تهران, انجمن ژئوتكنيك ايران, https://www.civilica.com/Paper-GEOTEC03-GEOTEC03_122.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Shamshirgaran, Amir Hossein & Babak Ebrahimian, 2018)
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Type: state university
Paper No.: 16739
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