以三筒型基础为研究对象,分析吸力筒筒高、加载角度、加载速度以及排水条件对其承载性能的影响。研究表明,在其他3种影响因素不变的情况下,随着筒裙高度的增大,三筒基础的水平承载力提高;不排水条件下,加载速度明显影响筒型基础水平承载力和筒内孔隙水压力,排水条件下加载速度对筒型基础的水平承载力影响有限;加载角度不同,筒型基础的水平承载力最大增加1倍;不排水条件较排水条件可致使水平极限承载力最大增幅达149%。因此,实际工程中,沉放三筒型基础后,宜关闭筒顶阀门,有助于筒型基础保持较好的水平承载能力。
Abstract
In this paper, the horizontal bearing capacity of the three-bucket foundation is taken as the research object. Analyze the effect of bucket height, loading angle, loading speed, and drainage conditions on its horizontal bearing performance. The research shows that when the other three influencing factors remain unchanged, as the bucket height increases, the horizontal bearing capacity of the foundation increase. Under non-drainage condition, the loading speed significantly affects the horizontal bearing capacity and the pore water pressure in the bucket. The loading speed under drainage condition has limited effect on the horizontal bearing capacity of the foundation. Under different loading angle condition, the horizontal bearing capacity has doubled. The non-drainage condition can cause the horizontal bearing capacity to increase by 149% compared to the drainage condition. Therefore, in actual engineering, after the sinking three-bucket-foundation, the valve on the bucket top should be closed, which helps to improve the horizontal bearing capacity of the bucket foundation.
关键词
海上风电 /
海洋平台 /
筒型基础 /
模型实验 /
承载力 /
排水方式
Key words
offshore wind power /
offshore platform /
bucket foundation /
model experimental study /
bearing capacity /
drainage method
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基金
中海石油（中国）有限公司科研项目“南海西部油田上产2000万方钻完井关键技术研究”（CNOOC-KJ 135 ZDXM 38 ZJ 05 ZJ）
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