桶形基础水平承载力极限平衡计算公式的理论推导

Mathematical Deduction of Analytical Formula for the Lateral Bearing Capacity of Single-bucket Foundation Based on the Limit Equilibrium Method

借鉴已有研究成果推导一种适用于工程的桶形基础水平承载力计算公式。考虑桶体转动中心位置变化、土体剪切作用及基底摩擦力对桶形基础水平承载能力的影响,利用三维极限平衡法推导出单桶形基础水平承载力计算公式,并与已有计算公式进行比较。结果表明,所推导的计算公式满足工程精度的要求,可用于指导桶形基础的工程设计。

The paper deduces a calculation method of bearing capacity bucket foundation for engineering application on the basis of the existing research results.Considering influences of barrel body rotation center position changes,shear effect and the friction force on the horizontal bearing capacity of bucket foundation,the mathematical derivation of analytic formula for estimating the bearing capacity of single bucket foundation in soft soil foundation level is successfully completed with the 3D limit equilibrium method.The result shows that the derived calculation formula is more perfect and more practical in the engineering accuracy requirement,and it can be used to guide the engineering design of bucket foundation.