基于尖点突变理论的摩擦桩竖向承载力分析

An Analysis on Vertical Bearing Capacity of Friction Pile Based on Cuspidal Catastrophe Theory

摩擦桩的竖向承载力主要由桩侧摩阻力来承担。将尖点突变理论引入摩擦桩竖向极限承载力的计算中,推导出了摩擦桩单桩竖向极限承载力的计算公式,用静载荷试验验证后,计算结果偏小,用于工程实践偏于安全。这可能是由于土体本身力学性质比较复杂、桩土共同作用机理难以描述,同时参数的选择也较难把握。

The ultimate bearing capacity of friction pile was undertaken by the friction force around pile. Based on the cuspidal catastrophe theory, the calculating formula of the vertical ultimate bearing capacity of friction pile is deduced in this paper. The static load test proves that the calculation results are slightly small whose imseeurity may be produced in engineering construction. This may result from the complex soil mechanistic property, the mechanism of interaction of soil and pile hard to be stated and the choice of parameter difficult to be controlled.