考虑应力状态的圆形基础地基承载力参数分析

摘要

利用MATLAB语言编制程序求解圆形基础地基弹塑性承载力p1／4，在求解过程中考虑土的静止土压力系数K0≠1，并分析土体抗剪强度粘聚力c、摩擦角φ变化时，静止土压力系数K0对地基临界荷载的影响。在设计中将未考虑土体实际应力状态的条形基础临界荷载作为圆形基础临界荷载使用，并对此进行了研究，结果表明：在粘聚力和摩擦角较小的江苏沿海地区，这种做法是偏危险的。%The numerical solution to the critical load p1/4 of a circular foundation is obtained by using MATLAB programming.The coefficient of earth pressure at rest,K0 ,is not set to be 1 in the program,so method corrects some calculating mistakes in solving subsoil bearing capacity.Analysis of the influence of earth pressure at rest on the critical load is also made for different shear strength.The result shows that substituting strip foundation critical load for circular foundation critical load with consideration of stress states tends to be dangerous,particu-larly in the coastal cities with small value of c in Jiangsu.