... and hence increased pile capacity which formed basis of acceptance of pile foundations installed offshore. Back-SRD assessment was carried out using dynamic monitoring data records to compare predicted driving with actual driving behavior observed on site. geologist geology platform design...

.... Then the monitoring data obtained during vibro driving were used adjust the soil model used for the initial simulation and to derive the pile capacity. Next the monitoring data for the Beginning of Restrike and the End of Impact Driving were used to assess the capacity yet again. The results as well as the soil...

... with an underwater impact hammer, or vibratory hammer, and are used for mooring floating structures. This paper presents a methodology to carry out a back analysis of mooring pile capacity based on pile driving data. The process involves two stages, the first is to assess the self-weight penetration of the pile...

... and in clay. Probabilistic calculations of the axial pile capacity for typical offshore piles using the above five design methods (API, Fugro, ICP, NGI and UWA methods) showed that method uncertainty is a major contributor to the uncertainty in pile foundation capacity. The method uncertainty has therefore...

... for fixed foundations and mooring anchors in API RP 2GEO and DNV. The static method of computing axial pile capacity described in API RP 2GEO (2011) is generally used to compute ultimate compressive and tensile capacities of pipe piles driven to a given penetration. Lateral soil resistance –pile deflection...

... life for the in-place conditions. weld in-place condition stress concentration factor calculation sn curve compressive stress butt weld upstream oil & gas fatigue life penetration subsea system offshore technology conference scf pile capacity pile section wall thickness...

... to significant differences in the reliability of piled foundations for offshore wind turbines. A reliability-based framework, taking into account the uncertainty in loads and pile capacities, is presented here as a basis for assessing wind turbine foundation reliability. For an example tripod structure...

... and probability of failure vary with the axial pile capacity calculation method. The study provides a contribution to the discussion on the reliability of the API, the NGI, the ICP and the Fugro methods. The material factor needs to be associated with the characteristic soil parameters selected for design...

... system water depth monopile stevens platform design pile capacity dense sand loading design method OTC 23635 Identifying Some Knowledge Gaps in Marine Foundation Practice - A Design and Construction Perspective Gerry Houlahan, Moffatt & Nichol; Paul Doherty, University College Dublin; Robert...

... consisted of verysoft to soft clay to a depth of 40 ft, underlain by medium dense to dense fineto medium sand to a depth of 78 ft, and dense to very dense silty fine sand. The driving of 18 indicator piles was monitored using a Pile Driving Analyzer. The Case method was used to estimate the pile capacity...

... api percussion-sampling technique pile capacity undrained shear strength percussion 2 percussion boring termination depth api 2000 seafloor shear strength site investigation axial pile capacity upstream oil & gas otc 19569 capacity ratio interpretation foundation design...

... probabilistic approach risk assessment gilbert platform reserves evaluation engineering pipeline hurricane risk and uncertainty assessment drilling operation management chemical spill information pile foundation pile capacity risk management technology conference lower-bound...

..., and also to examine cyclic loading effects. Introduction The GOPAL project is investigating a new technology to increase pile capacity in sands. Jet grout bulbs are created below the toe of conventional driven steel piles. The jet grouted "soil-cement" would classify as a sandstone of moderate strength...

... are provided to apply this approach within the frameworks of both the Load and Resistance Factor Design code and the older Working Stress Design code. The design charts relate design factors to the magnitude of uncertainty in pile capacity resulting from the lack of a site-specific boring. This reliability...

... (for cohesionless soils) are considered, along with the bias and coefficient of variation of the pile capacity subjected to axial and lateral loads. Bias is defined as the ratio between true and computed values. The uncertainties in the parameters considered in the geotechnical problems are thus identified...

...-term pile capacity. However, a growing number of reports of longer-term changes in capacity are emerging. Much uncertainty surrounds the factors responsible for these changes. This paper describes static and dynamic load tests on four open-ended piles, 0.324m in diameter, 11 and 22m long, driven...

...@l * OTC 7994 Numerical Modelling of Cyclic Pile Capacity in Clay F. Nadim, Norwegian Geotechnical Institute, and R. Dahlberg, Det Norske Ventas AS Copyright 1SS8, OflstWO Tedmdogy QXrferOIW Thh PIJF was wec.6rMed at tha Annual OTC h Houston Texee, U. S.A.. S-9 May 1S9S This paper WEISwleded b...

...OTC 7974 @ . . The Applicability of the Ras Tanajib Pile Capacity Method to Long Offshore Piles by Robert F. Stevens, Fugro-McClelland Marine Geosciences, Inc., and Khelll A. A1-Shafei, Saudi Ammco copyright 1S98, OFFSHORE TECHNOLOGY CONFERENCE This paper was prepared for presentation...

... overail calculated ~ vaiue of 2.5 to 3. The actuai reliability index of structures may be higher than this due to factors not included in the computations. Probability of Failure The probability of a pile failing is a function of pile capacity (resistance, R) and applied loading (L). If we consider...

... statistical anafyses. Predictions of pile capacity made using this new method are shown to be more accurate than those made using conventional current design criteria. Introduction Various reviews of axiaf pile load test data on i YE ties Veninto clays were performed in the mid eighties . The results...