钻扩桩竖向承载力分析

BEARING CAPACITY ANALYSIS OF UNDER-REAMED PILE

钻孔扩底桩已在高层建筑和重要工程中得到了广泛应用，但是目前设计尚无规范可循，主要参考的是大直径钻孔桩的设计规范。结合实例详细分析了钻孔扩底桩的载荷传递规律以及承载特性，讨论了单桩竖向承载力与桩侧摩擦力、桩端阻力以及桩身混凝土强度的关系，对钻孔扩底桩的承载力设计有一定的借鉴意义。

Under-reamed pile has been applied to high building and big project. But engineers have no criterion to consult when they design under-reamed pile. Accroding to the example, author has analysed the rule of load transfer and the bearing characteristic of under-reamed pile, and has discussed the relation among bearing capacity, skin friction, tip resistance and concrete strength of single pile. There may be helpful for the design of under-reamed pile.