The secant piled-bucket foundation (SPBF) is innovatively proposed to suit the large-capacity mainstream, which is optimized from a traditional foundation and consists of an upper pile cap and a lower bucket skirt. Compared with the pile foundation, the SPBF has great advantages and deserves further study. In this research, the bearing mode, bearing capacity and failure mode under various loads of SPBF in saturated clay have been fully studied. First, the small-scale model test in saturated clay is carried out to verify the finite element (FE) method; the deviation between the FE results and the test results under vertical load and horizontal–moment load is 10.65% and 10.25%, respectively. Next, the bearing mode of SPBF in engineering scales is investigated via FE method, the results indicating that the bearing mode of SPBF is similar to that of a prestressed tubular foundation. Finally, the bearing capacity and failure mode of SPBF are studied and the findings show that the vertical bearing capacity and horizontal–moment bearing capacity of SPBF is 96.53 MN and 1.62 MN, and the weak parts of SPBF are concrete of the pile cap and the anchor bolts, respectively. This paper provides support for design and further optimization in the future.

中文翻译：

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饱和粘土中正割桩斗基础承载力研究

割接桩斗基础（SPBF）是为适应大容量主流而创新提出的，在传统基础上进行优化，由上承台和下斗裙组成。SPBF与桩基相比具有很大的优势，值得进一步研究。本研究充分研究了饱和黏土中SPBF在各种载荷下的承载方式、承载能力和破坏方式。首先，在饱和粘土中进行小规模模型试验，验证有限元（FE）方法；有限元结果与垂直载荷和水平力矩载荷下的试验结果的偏差分别为 10.65% 和 10.25%。接下来，通过有限元方法研究了工程规模的SPBF轴承模式，结果表明，SPBF 的承载方式与预应力管状基础的承载方式相似。最后，对SPBF的承载力和破坏模式进行了研究，结果表明SPBF的竖向承载力和水平弯矩承载力分别为96.53 MN和1.62 MN，SPBF的薄弱部位是承台混凝土和桩身混凝土。地脚螺栓，分别。本文为今后的设计和进一步优化提供了支持。