考虑应力路径的地基临塑(界)荷载计算

Calculation of Critical Edge Load with Consideration to Stress Path

土的固结不排水剪总应力强度指标在许多地基规范中被建议采用,具有明显的应力路径相关性。推导一个考虑应力路径影响的地基塑性区和临塑(界)荷载计算公式,将此公式和应用室内常规三轴试验指标理论值计算的结果进行了比较,分析了室内常规三轴指标的适用性。

The total stress strength parameters from CU testing are dependent on stress path. Results from normal CU testing, which has different stress path with in - situ stress condition, are recommended for application by some codes. This paper discuss the error for critical edge load calculation arising from the stress path difference by deducing a formula with consideration to stress path and comparing the results with that from normal CU parameters. It conclude that the difference of stress path has no significant influence on the results and normal CU testing is applicable.