碎石桩复合地基稳定性塑性极限分析法

The application of plasticity limit analysis method in the stability study of stone column composite foundation

基于塑性力学极限分析上限定理 ,建立了复合地基平移、转动相结合的破坏机构 .根据外部作用荷载和土体自重所做的外功率等于地基变形所消耗的内部能量耗损率 ,求得了碎石桩复合地基稳定安全系数计算公式 .工程算例分析表明 。

Based on energy analysis method ,not only the stress-strain relation in the soil but also the flo w rule of Mohr-Coulomb material are considered. According to upper bound th eorem limit analysis, the safety factor of stone column composite foundation sta bility can be calculated .By an engineering example, the new analysis method ha s some practical value to the stability analysis of composite foundation .