表面堆载作用下群桩负摩擦研究  

Research of negative friction for pile groups under surface load

作　　者：王建华[1] 高绍武[1] 陆建飞[2] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200240 [2]江苏大学,江苏镇江212013

出　　处：《计算力学学报》2003年第2期169-174,共6页Chinese Journal of Computational Mechanics

基　　金：教育部博士点基金(980224832)资助项目.

摘　　要：利用Biot固结理论和积分方程方法研究了表面有堆载的群桩负摩擦问题。根据基本解得出了群桩在圆形均布载荷作用下在时间域内的第二类Fredholm积分方程组。运用Laplace变换对上述积分方程组进行简化,求解上述积分方程组并进行相应的数值逆变换就可得出群桩在表面圆形均布载荷作用下的变形、轴力、孔压和桩侧摩阻力随时间的变化情况。The negative friction problem of pile groups under the surface load is studied by using the Biot's consolidation theory and the integral equation method. The second kind of Fredholm integral equations of the pile groups under the action of circular load in saturated soil is obtained by using the fundamental solution. The integral equations can be simplified by means of Laplace transform methods. By the numerical solution of the integral equations and the corresponding inverse integral transform, the displacement, axial force, pore pressure and shear stress of the pile groups under the action of circular load and the pore pressure along the pile groups' axis are obtained.

关 键 词：负摩擦 BIOT固结 群桩 流变 FREDHOLM积分方程 

分 类 号：TU437.1[建筑科学—岩土工程]