摩擦桩竖向承载力计算方法研究

研究目的：解决现行桩基竖向承载力计算方法与桩-土体系的竖向变形相互独立的问题。 研究方法：首先，通过分析桩-土体系的变形机理得出合适的荷载传递函数模型；其次，根据桩-土体系的变形协调原则对桩基础的竖向承载力进行分析研究。 研究结果：针对现行桩基竖向承载力计算方法的不足，提出了一种与桩-土体系竖向变形相协调的计算方法。 研究结论：以变形协调原则与荷载传递法为基础推导的桩基承载力计算方法，能够解决桩基竖向承载力与竖向位移计算各自独立这一矛盾，满足工程设计要求。

Research on Computing Method for Vertical Bearing Capacity of Friction Pile Foundation

Research purposes: The purposes are to solve the problems existed in present computing method for vertical bearing capacity of pile foundation and the problems related to the vertical independent distortions each other between pile and soil mass system. Research methods:First,the appropriate load transfer function model is obtained through the analysis of distortion mechanism of pile and soil mass system,then,the analysis and research are made on vertical bearing capacity of pile foundation based on the principle of compatibility of deformation between pile and soil mass system. Research results:Aiming at the existing problems existed in the computing method for vertical bearing capacity of pile foundation,a new computing method is proposed,by which the vertical deformations between the pile and soil mass system can be calculated compatibly. Research conclusions:The result shows the contradiction of separate calculating the vertical bearing capacity of pile foundation and the vertical displacement can be solved and the requirement of engineering design can be satisfied by adopting this computing method for vertical bearing capacity,which is formed mainly on the basis of principle of compatibility of deformation and load transfer method.