Reliability of design approaches for axially loaded offshore piles and its consequences with respect to the North Sea

Schmoor, Kirill Alexander; Achmus, Martin; Foglia, Aligi; Wefer, Maik

doi:10.1016/j.jrmge.2018.06.004

Cited by 13 publications

(9 citation statements)

References 5 publications

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“…Since the presence of another specimen in the vicinity of a pile being tested could also trigger an unwanted pile-pile interaction, a distance of approximately ten pile diameters was maintained between the pile systems. Tests of piles under tensile loading were carried out on the left-hand side of the soil tank within the European IRPWind project and are reported in Schmoor et al (2018). All the research activities described in this paper, including the cone penetration test (CPT) investigations, were performed after completion of the IRPWind campaign.…”

Section: Description Of the Experimental Campaignmentioning

confidence: 99%

“…All the research activities described in this paper, including the cone penetration test (CPT) investigations, were performed after completion of the IRPWind campaign. Schmoor et al (2018).…”

Section: Description Of the Experimental Campaignmentioning

confidence: 99%

“…PLR values equal to 1 identify an unplugged installation, i.e., non-displacement piles or coring penetration, whereas PLR values equal to 0 imply plugged installation, i.e., full displacement piles. The results of the plug measurements in terms of PLR as a function of the internal diameter, D i , are plotted in Figure 13 together with: 1) The empirical PLR prediction formula of Yu and Yang (2012); 2) The empirical PLR prediction formula of Gudavalli et al (2013); 3) The PLR results of the experimental campaign on tensile loaded piles reported in Schmoor et al (2018). The latter was performed in the same artificially prepared soil of the experiments presented here (see Figure 2).…”

Section: R a F Tmentioning

confidence: 99%

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Large-scale model tests of a single pile and two-pile groups for an offshore platform in sand

et al. 2021

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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 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 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.

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Section: Description Of the Experimental Campaignmentioning

confidence: 99%

Section: Description Of the Experimental Campaignmentioning

confidence: 99%

Section: R a F Tmentioning

confidence: 99%

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Large-scale model tests of a single pile and two-pile groups for an offshore platform in sand

et al. 2021

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“…Расчет надежности свайных фундаментов, предусмотренный в китайских строительных нормах, проводится вероятностно-статистическими методами [9], требующими полной статистической информации о контролируемых параметрах в математических моделях предельных состояний. Вероятностно-статистический метод, построенный на основе метода Монте-Карло, рассмотрен в работе [10].…”

Section: том 8 выпуск 4 (30)unclassified

“…Pile foundation reliability analysis provided in the Chinese building codes is carried out by probabilistic and statistical methods [9] requiring complete statistical information about the monitored parameters in mathematical models of limit states. The probabilistic and statistical method based on the Monte Carlo method is considered in the study [10].…”

Section: литература Introductionmentioning

confidence: 99%

Friction Pile Reliability Analysis With Respect to the Foundation Soil Bearing Capacity

Уткин

2019

Stroitel’stvo: nauka i obrazovanie

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Introduction. Friction pile reliability under the action of the central compressing force according to the Set of Rules 24.13330.2011 is calculated from the first group of the limit states — from the bearing capacity (using the pile material strength criteria and the foundation soil bearing capacity criterion) and from the second group of the limit states — from the pile load-deformation behaviour. Materials and methods. A method of calculating the friction pile reliability from the foundation soil bearing capacity is considered. Reliability appears as a quantitative measure of safety of a single pile operation. The foundation soil bearing capacity is accepted as a criterion for the pile operating capacity. The pile reliability analysis is based on the statistical information obtained during the preliminary pile testing with measuring the friction on the surface of the pile placed in the soil layers and the soil stress under the pile foot. The testing methods for obtaining the statistical information were well-known and used earlier to generate the lists of f-values and R-values in the Set of Rules 24.13330.2011. Each random parameter is measured at least three times. Results. The theory of analysis of the preliminary pile reliability in accordance with GOST 27751-2014 “Reliability of building structures and foundations” has been built on this statistical information. Reliability as the calculation result is represented by interval notation. The mathematical model of the limit state of the pile from the foundation soil bearing capacity has been borrowed from the Set of Rules. The connection (formula) between the length of the pile and the value of its reliability as a safety measure for its operation in the foundation soil has been established. Evaluation of the friction pile reliability corresponding to the characteristic value is carried out by calculation (trail-and-error method) from the mechanical properties of the soil and the load on the pile with the indication of the value of the length of the pile or the sum of the soil layers, each of the values in this case shall be not more than 2 m. The reliability analysis is described in the case studies set out in the article. Conclusions. Pile reliability analysis is based on the actual information about the pile operation in the foundation soil according to the current regulations of the Russian Federation, so the proposed method of the friction pile reliability analysis can be transferred into practice. It can also be used in the reliability calculation for other load-bearing elements, in the regulatory literature, and in the academic work of construction universities.

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Probabilistic Analysis of Bored Pile Foundations in the Design Phase: An Application Example

2021

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Reliability of design approaches for axially loaded offshore piles and its consequences with respect to the North Sea

Cited by 13 publications

References 5 publications

Large-scale model tests of a single pile and two-pile groups for an offshore platform in sand

Large-scale model tests of a single pile and two-pile groups for an offshore platform in sand

Friction Pile Reliability Analysis With Respect to the Foundation Soil Bearing Capacity

Probabilistic Analysis of Bored Pile Foundations in the Design Phase: An Application Example

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