文献类型： 会议论文

第一作者： P.C. Wong

作者： P.C. Wong ¹ ; J.S. Templeton III ² ; O.A. Purwana ³ ; H. Hofstede ⁴ ; M.J. Cassidy ⁵ ; M.S. Hossain ⁵ ; C.M. Martin ⁶ ;

作者机构： 1.ExxonMobil Development Company

2.SAGE USA, Inc.

3.Keppel Offshore & Marine

4.GustoMSC Engineers

5.U. of Western Australia

6.U. of Oxford

会议名称： Offshore Technology Conference

主办单位：

页码： 1-23

摘要： This paper presents the new foundation assessment provisions in ISO 19905-1. The paper discusses the improvements to spudcan penetration analysis achieved by the refinement of bearing capacity formulations and by adoption of a fundamentally new approach to backflow prediction which accounts for the changes in soil flow regime and the evolving pattern of soil deformation in the vicinity of the spudcan. It also addresses the upgrades made to the SNAME 5-5A approach to foundation capacity and foundation stiffness reduction in sand and clay as well as the means used to better account for the effects of deep spudcan penetrations in clay. The change to, and basis for, the use of gross foundation capacity in some of the calculations are also discussed. Finally, the paper presents the new foundation acceptance checks framework consequent to the change from available capacity/reaction concept in SNAME 5-5A to gross capacity/reaction approach in ISO 19905-1. At the time of this paper submission, it was expected that ISO 19905-1 would be isssued prior to the presentation of the paper at the 2012 Offshore Technology Conference. Upon the issue of this standard the new foundation assessment provisions described in this paper will be required for jack-up site-specific assessments worldwide.

分类号： P75`P75