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基于一维蠕变试验成果,并借助Kelvin流变模型建立了能同时考虑时间-应力-应变三者互动的Kelvin-双曲线经验模型。通过分析,表明该模型能反映压实黄土随时间增加,应变逐渐增大,应变速率逐渐减小,呈衰减型发展的蠕变特性。同时考虑到实际工程中填土荷载分级施加、前后两级荷载施加的时间间隔及填土层的厚度等问题,在做了必要的假定后,结合分层总和法的思想得出了相应的黄土高路堤沉降过程计算模型,并将该经验模型应用于实际工程,从而验证了模型的可靠性,同时对该模型的适用性进行了探讨。
Based on the results of one-dimensional creep test and Kelvin-hyperbolic empirical model, which can simultaneously consider the interaction of time, stress and strain with Kelvin rheological model, The analysis shows that the model can reflect the creep behavior of compacted loess with time increasing, strain increasing and strain rate decreasing gradually. At the same time, taking into account the actual project grading load applied, the load applied before and after the two intervals and the thickness of the fill layer and so on, after making the necessary assumptions, combined with the idea of stratified summation of the corresponding loess The calculation model of high embankment settlement process is applied to the actual project, which verifies the reliability of the model. Meanwhile, the applicability of the model is also discussed.