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基于Mohr-Coulomb本构模型,针对吸力式斜壁桶形基础建立了三维有限元数值计算模型,并通过模型试验数据进行了验证。在此基础上,细致地进行了数值计算与分析,探讨了长径比、桶壁斜率等相关影响因素与饱和软黏土中斜壁桶形基础承载力之间的依赖关系。同时以Vesic经验公式为基础,考虑桶体与相接触土体之间的黏结作用,提出了一个针对斜壁单桶基础的竖向承载力公式,公式结果与有限元结果吻合较好。
Based on the Mohr-Coulomb constitutive model, a three-dimensional finite element numerical model is established for the suction skew-wall bucket foundation and validated by model test data. On this basis, the numerical calculation and analysis are carried out meticulously, and the dependence of the factors such as aspect ratio and slope of bucket wall on the bearing capacity of bucket base in saturated soft clay is discussed. At the same time, based on the Vesic empirical formula, considering the bond between the barrel body and the contact soil body, a vertical bearing capacity formula is proposed for the single-barrel slant foundation. The formulas agree well with the finite element results.