桩端土层性质不同对超长群桩的影响分析

Research of Effects on Super-long Group Piles Foundation by Different Characters of Several Soil Layers

超长桩的承载变形机理与普通短桩不同,其设计存在理论与实际之间的矛盾。通过运用有限差分软件对不同桩端土层情况进行数值计算,得出了超长群桩桩侧阻力、桩端阻力与沉降的关系,探讨了桩端土层不同对超长群桩效应的影响。

There are differences for piles and common short piles, and mechanisms of bearing forces and deformations between super long the designs of super long piles contain contradictions between theo ry and practice. Using the software of finite difference FLAC3D, in this paper, relations of resistances at sides of piles, resistances at bottoms of piles and settlements for super long group piles are obtained. Then by comparing the results of super long single pile and super long group piles, the group effects of super long piles are preliminarily discussed.