70m水深主桩式导管架平台结构设计及其技术特点

Structural Design and Technical Features of Pile-in-leg Type Jacket Platform at Water Depth of 70 m

在固定式导管架平台设计中,当水深超过60 m时,通常采用裙桩式导管架;在某些海域,如果条件允许,可考虑采用主桩式导管架,即桩从导管架主腿内打入。文章对国外某项目70 m水深主桩式导管架平台结构的设计方法进行了介绍,对设计中与国内常规或由于新版本规范要求而与以往导管架平台设计不一样的内容进行了重点说明,其内容涵盖了在位分析、施工分析及部分附属结构的设计新技术,旨在为后续类似平台结构设计提供借鉴和参考。

The jacket platform at the water depth of more than 60 m is generally designed as the structure with skirt pile foundation, but in some sea areas, the pile-in-leg type jacket platform is considerable if conditions permit. The piles of such type platform are driven through the main legs of the jacket. This paper introduces the design method of a foreign pile-in-leg type jacket platform at the water depth of 70 m and puts emphasis on the differences between the original jacket design methods and the domestic traditional codes or new version code requirements, which cover the in-place analysis and construction analysis of jacket platform and new design techniques of some appurtenances. The design concepts in this paper can provide good experience and reference to future similar jacket platform design.