重塑饱和黄土应变-加载速率-时间计算模型

Strain-loading rates-time Model of Remolded Saturated Loess

基于GDS静三轴仪,对西安重塑饱和黄土进行了不同加载速率的连续加载K0固结试验,研究分析了K0固结过程中加载和孔压消散两个阶段土体的变形特性。通过总结分析相关的经验模型,利用参数变异法推导出重塑饱和黄土在K0固结过程中两个阶段的应变-加载速率-时间关系计算模型,模型中参数均可由室内GDS静三轴试验得到。研究结果表明,加载速率对变形有一定的影响,引入加载速率的模型计算结果与试验测得结果相吻合,为研究K0固结过程饱和土的变形特性提供了一种新方法。

In order to analyze the deformation characteristics of remolded saturated loess in loading stage and pore pressure dissipation phase of K0 consolidation process,K0 consolidation tests of Xi＇ an loess under continuous loading with dif- ferent rates are carried out on geotechnical digital systems （GDS） tri-axial instrument. Strain-loading rates-time relation model of remolded saturated loess in two stages of Ko consolidation process was deduced using the method of variation of parameters by summary and analysis on the experience model. The parameters in the model can be got by GDS tri-axial instrument. The results show that loading rates has certain effect on deformation. Calculation results of the model with load rates are consistent with the test results. A new method to study the K0 consolidation deformation characteristics of saturated soil was provided.