After description of slide line fields according to the different proportion of width / diameter , the stress function in flat plate upsetting has been determined , the changing rule of slide line fields been described , the process of column upsetting been simulated by using the software of abaqus and the theoretical value been proved through comparing the simulation value with the theoretical value 摘要本文应用滑移线理论来求解平板镦粗模型，描述了在不同宽径比下的滑移线场，确立该模型单元的应力场表达式，描述其滑移线场的变化规律，最后运用abaqus软件对圆柱体镦粗进行数值模拟，将模拟值与理论值进行对比，对理论值进行验证。
Abstract : reviewed are five methods for the analysis of the penetration of jacked - in piles , namely , cavity expansion method , strain path method finite element method , slip line method and calibration model test . after analysis , it is pointed out that it is more rational to adopt sub - statical spatial axisy numerical formulas based on traditional plane - strain cavity expansion method in the analysis . after spatial closed - form solutions are obtained for soil movements , stresses and initial excessive pore pressures generated durihy pile penetration are found out . it is suggested that finite element analysis together with centrifugal model test be used in verifying the results 文摘:在分析饱和粘土中静压桩的贯入机理的基础上，对静压桩沉桩分析的圆孔扩张理论、应变路径法、有限元分析、滑移线理论和模型槽试验等五种方法逐一进行评述，并提出在传统的平面圆孔扩张理论基础上加以改进，采用准静态空间轴对称方程组对静压桩贯入过程进行模拟，从而得出土体位移、应力、初始超孔压的空间解析解，同时采用有限元分析、模型槽试验相互印证的研究方法
The stress and deformation in any spots of 3d foundation soils which is under rectangular homogeneously distributed load are calculated and analyzed by methods of elastic theory and fortran program ; 3 . the scope of foundation soils deformation under rectangular homogeneously distributed load is analyzed by the use of slide and move thread theory ; 4 . by using the finite element analysis software of ansys , with engineering examples , the deformation characteristics of 3d elastic - plastic foundation soils under rectangular homogeneously distributed load are imitated and analyzed , at the same time , the method of settlement calculation of soils is checked 研究内容包括： 1 、测试了天然地基、复合地基在不同压板形状及尺寸下承压板下及周围地基土体的沉降，并做了数据计算分析； 2 、利用弹性理论方法和fortran程序分析计算了三维地基土体在矩形均布荷载下任意位置点的应力及变形； 3 、利用滑移线方法分析了均布荷载下土体的变形范围问题； 4 、应用ansyas大型有限元分析软件，结合工程实例，模拟分析了三维弹塑性地基土体在方形均布荷载下的变形特性，并对地基沉降计算方法进行了工程验算。
