海上自升式稳桩平台桩基竖向承载特性理论分析  

Theoretical Analysis on Vertical Bearing Characteristics of Pile Foundation of Offshore Self-elevating Stabilized Pile Platform

作　　者：徐狄 叶兆艺 陈凤云 雷传 XU Di;YE Zhaoyi;CHEN Fengyun;LEI Chuan(PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;Zhejiang East China Engineering Consulting Co.,Ltd.,Hangzhou 311122,Zhejiang,China;Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]浙江华东工程咨询有限公司,浙江杭州311122 [3]浙江大学海洋学院,浙江舟山316021

出　　处：《水力发电》2023年第1期79-83,共5页Water Power

基　　金：中国电建集团华东勘测设计研究院有限公司科技项目(KY2020-ZX-19)。

摘　　要：采用《海洋井场调查规范》法、《建筑桩基技术规范》法、《美国石油协会规范》法和Hansen公式法,对江苏省启东海域某自升式稳桩平台的桩基进行了竖向承载特性分析,研究了不同理论方法所得桩基竖向承载力的差异,以及桩径和土体参数对桩基竖向承载力的影响规律。由理论分析可知,Hansen公式法计算得到的桩基竖向承载力最为保守,《海洋井场调查规范》法最不保守;基于Hansen公式法,桩径为1.6、1.8、2.0、2.2 m的平台桩基安全贯入深度分别为15.5、14.0、13.0、12.0 m;基于Hansen公式法,土体内摩擦角对桩基竖向承载力的影响程度最大。The vertical bearing capacity of pile foundation of self-elevating stabilized pile platform in a certain sea area of Qidong, Jiangsu Province is analyzed by using Marine Well Site Investigation Code, Technical Code for Building Pile Foundation, API specifications and Hansen formula respectively, and the differences of vertical bearing capacity of pile foundation obtained by four theoretical methods are studied. The influence law of pile diameter and soil parameters on vertical bearing capacity of pile foundation is also analyzed. It can be seen from the theoretical analysis that,(a) the vertical bearing capacity of pile foundation calculated by Hansen formula is the most conservative, and the Marine Well Site Investigation Code method is the least conservative;(b) based on Hansen formula, the safe penetration depth of platform pile foundation with pile diameter of 1.6, 1.8, 2.0 m and 2.2 m is 15.5, 14.0, 13.0 m and 12.0 m respectively;and(c) based on Hansen formula, the influence of soil internal friction angle on vertical bearing capacity of pile foundation is the greatest.

关 键 词：自升式稳桩平台 理论计算 竖向承载力 单桩基础 海上风电 

分 类 号：TU473.1[建筑科学—结构工程] P75[建筑科学—土工工程]