扩底桩深度效应数值解法及其承载力确定方法

根据经典弹性力学理论分析了扩底桩桩－土作用的力学性质和荷载传递机理。用离散法计算侈层地基上桩－土作用的应力、应变及其分布规律，求得桩端阻力临界桩长、临界厚度数值解与其与土的性质和桩的几何尺寸之间的相互关系，给出了考虑深度效应的单桩极限承载力标准值的理论解和计算实例。

Numerical solution of depth effect and determination method of bearing capacity for pile with expanded end

According to classical theory of elasticity,mechanical characters of the pile -soil interation and loading transfer mechanism were analyzed.Stress and strain distribution in pile-soil interaction in multi-layer soils by using the discrete method.Then obtained the critical pile length and critical thickness were obtained by numerical method and the relation of them to soil characters and the geometrical size of the pile were calculated.Meanwhile,the theoretical solution and calculative examples of the standard value of the limit bearing capacity for the single pile with the depth effect considered were put forward.