饱和黏土中复合条形防沉板基础承载特性研究

发布时间：2018-04-17 04:01

  本文选题：水下生产系统 + 防沉板基础　； 参考：《水利学报》2015年S1期

【摘要】：防沉板基础是深海油气资源开发中常用基础形式,其承受的荷载具有复杂性、非线性和不确定性,给防沉板基础的稳定性研究带来了巨大挑战。基于条形基础的承载特性提出了新型复合条形防沉板基础的结构形式,通过优化基础条数量n、宽度B和间距l可实现复合条形基础承载效率系数的最大化。结合工程设计实例,开展了该新型结构基础与传统矩形防沉板基础的对比设计。研究表明,在基础底面积相同的情况下,复合条形基础的竖直向极限承载力与矩形防沉板基础相比提高10%~20%。当复合条形基础的基础条宽度B一定时,地基竖直向极限承载力随着l/B的增加先增大后减小,最后趋于稳定。对不同的基础条宽度B,地基竖直向极限承载力均在l/B=0.2时达到最大值,且随着基础条数量n的增大而增大。
[Abstract]:Mudmat foundation is the development of deep-sea oil and gas resources in the common form of foundation, the load has the complexity, nonlinearity and uncertainty, which brings a great challenge to research on the stability of mudmat foundation. The bearing characteristics of strip foundation based on composite strip structure based anti sinking plate is proposed. By optimizing the number of N, the maximum width of the B and l based composite bar spacing load efficiency coefficient. Combined with the example of engineering design, carried out with the traditional rectangle of the new structure based anti contrast sink design board foundation. The results show that in the base area under the same vertical composite foundation and the ultimate bearing capacity of rectangular mudmat foundation improvement compared to 10%~20%. when the composite strip foundation foundation width B, the vertical ultimate bearing capacity of the foundation with the increase of l/B increases first and then decreases, finally tends to be stable For different base strip width B, the vertical ultimate bearing capacity of the foundation reaches the maximum at l/B=0.2, and increases with the increase of the number of base strips of n.

【作者单位】： 水利工程仿真与安全国家重点实验室天津大学;港口岩土工程技术交通行业重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(2014CB046800) 国家自然科学基金优秀青年基金(51322904) 天津市自然科学基金面上项目(12JCYBJC4700)
【分类号】：TU476
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本文编号：1761954