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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。
Based on GDS static triaxial apparatus, continuous loading K0 consolidation experiment with different loading rates was carried out on the remolded saturated loess in Xi’an. The deformation characteristics of soil under loading and pore pressure dissipation in K0 consolidation process were analyzed. Through the analysis and analysis of relevant empirical models, the parameter-variation method is used to derive the strain-loading rate-time model for the two stages of remolded saturated loess consolidation in K0. The parameters of the model can be obtained from the static GDS . The results show that the loading rate has a certain influence on the deformation. The calculation results based on the loading rate coincide with the experimental results, which provides a new method for studying the deformation characteristics of saturated soil under K0 consolidation.