海上风机裙式斜壁桶形基础承载力及地基变形机理研究

项目名称： 海上风机裙式斜壁桶形基础承载力及地基变形机理研究

项目编号： No.41306088

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 刘金龙

作者单位： 合肥学院

项目金额： 25万元

中文摘要： 虽然桶形基础已逐步应用至海上风电工程中，但是对其承载特性及变形机理的研究尚处于起步阶段，特别是对新型桶形基础结构形式的研究较少。当前有待发展防止桶形基础受冲刷失稳的技术与方法，有待针对桶形基础开展包括弯矩与扭矩荷载在内的试验研究，有待建立桶形基础承载性能与地基失稳理论。为此，本项目以新型结构-裙式斜壁桶形基础为研究对象，采取室内试验、数值模拟与理论分析相结合的研究手段。首先，对竖向荷载、水平荷载、弯矩、扭矩等单独作用及组合作用下裙式斜壁桶形基础的承载特性、变形机理与破坏模式进行试验考察；其次，通过归纳试验数据，建立各类荷载作用下裙式斜壁桶形基础承载力的经验计算公式，并探讨相应变形机理与破坏模式；再次，基于校验过的数值计算方法，通过大量变动参数比较研究，系统考察裙式斜壁桶形基础的变形特性，建立相应破坏包络面函数式。研究成果为裙式斜壁桶形基础的设计奠定理论基础，势必促进桶形基础的应用与发展。

中文关键词： 斜壁桶形基础；承载力；变形；锚泊基础；

英文摘要： Although bucket foundation has been gradually used in offshore wind turbines engineering, the research on bearing capacity and deformation mechanism of bucket foundation is still in its infancy, which can not meet the needs of engineering design, especially the new structure style of bucket foundation has rarely been innovated.The technique and method to prevent eroding around bucket foundation should be developed, the experiments including moment and torsion should be carried out, the bearing capacity and foundation failure theory of bucked foundation should be established. Therefore, a new structure-skirted and tapered bucket foundation for offshore wind turbines is to be studied in this project, with indoor test, numerical simulation and theoretical analysis.Firstly, the bearing capacity, deformation mechanism and failure model of skirted and tapered bucket foundation would be studied by tests with vertical load, horizontal load, moment and torsion. Secondly, the calculation method of bearing capacity of skirted and tapered bucket foundation would be found through the results of test, and the deformation mechanism and failure model would be discussed. Thirdly, the failure envelope and deformation law of skirted and tapered bucket foundation would be established, based on lots of changeable parameters compara

英文关键词： tapered bucket foundation；bearing capacity；deformation；mooring base；