复合地基中群桩相互作用机理的数值试验研究

应用“数值仿真试验”的思路与方法,首先分析了两根桩间的相互影响机理,然后推广到大面积群桩（２５桩）的情况,从而系统研究了桩－土－桩相互作用的机理与效果,及群桩效应中附加应力场、桩身上摩阻力的分布规律与特点,为群桩复合地基的定量设计提供了科学依据,同时也显示了“数值仿真试验”这一思路在复合地基理论的研究中所具有的优越性。

NUMERICAL SIMULATION TEST ON INTERACTION MECHANISM OF GROUP PILE COMPOSITE FOUNDATION

Based on the general idea of "numerical simulation test" and the introduced Austria software FINAL, the distribution laws of additional stresses and friction between pile and soil are researched systematically, the effects of cushion on the bearing characteristics of various composite foundations are discussed by means of the numerical tests with double --pile and 25-pile models in this paper, from which the mechanic interaction mechanism of group-pile composite foundation is summarized. The influences of the pile stiffness and the space between piles are studied in order to make a best design. The results of this research will not only be profitable and helpful to the designers and constructors, but also is a good example to demonstrate that the "numerical simulation test" has outstanding advantages in the studies of the theories of composite foundation.