群桩-土-承台结构共同作用的数值计算研究

群桩承载性状的数值计算,是在模型试验的基础上,为研究桩-土相互作用,采用一种既简单又符合土体成层、非均质实际情况的有限层计算模型。该文论述的计算模型不仅能满足工程实际的弹性计算要求,还研究了桩周土体的非线性特性。同时,还综合应用弹性理论法和荷载传递法的优点模拟桩的承载性状,利用有限元分析软件ANSYS建立其力学模型进行计算。数值计算结果与实测结果吻合良好,表明有限层方法计算超长群桩基础是可行的。

Study on Numerical Value Calculation of Common Action of Group Pile - Soil - Base Slab Structure

The numerical value of bearing capacity character of group pile is calculated on the basis of model experiment.A calculation model of the finite layer not only being simple,but also according with the actual conditions of the soil body being layers and not homosphere is applied to study the interaction of pile - soil.The calculation model discussed in the article can not only meet the elastic calculation requirement of the engineering practice,but also study the nonlinear characteristic of soil surrounding the pile.The article applies the advantages of the elastic theory method and load transferring method to simulate the bearing character,and uses the finite element analysis software ANSYS to set up its mechanics model for calculation.The calculation result of numerical value matches better with the measured result.It is showed that it is feasible to use the finite layer method for calculating the foundation of the super-long group pile.