为研究长周期循环荷载对多筒导管架基础水平承载力的影响,在砂土地基中开展物理模型试验,考虑循环加载次数、循环幅值比及对称比等因素为变量,对基础在循环加载后的水平单向极限承载力进行分析。结果表明：随着循环荷载幅值比和循环次数的增加,基础周土的致密性得到有效提高,进而增强了水平极限承载力。同时循环荷载对称比的增加会减小基础的水平承载力。说明水平单调承载力受循环荷载极值差的影响,差值越大对于基础周土的致密化效果越好,水平承载力越大。
Abstract
In order to study the influence of the long-period cyclic load on the horizontal bearing capacity of the foundation of the tripod suction jacket, a physical model test is carried out in the sandy soil foundation, and the one-way horizontal ultimate bearing capacity of the foundation after cyclic loading is analyzed considering the factors such as cyclic loading times, cyclic amplitude ratio and symmetry ratio as variables. The results show that with the increase of cyclic load amplitude ratio and cycle times, the compactness of the soil around the pile is effectively improved, and the horizontal unidirectional bearing capacity is enhanced, while the bearing capacity decreases linearly with the increase of the cyclic load symmetry ratio.
关键词
海上风电 /
吸力式筒型基础 /
水平承载力 /
循环荷载 /
物理模型试验 /
循环次数
Key words
offshore wind power /
suction bucket jacket foundation /
horizontal bearing capacity /
cyclic load /
physical modeling test /
cyclic number
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基金
上海勘测设计研究院有限公司科研项目（2021FD（8）-022）
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