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考虑流变特性的黄土高路堤沉降过程计算方法

, PP. 25-29

Keywords: 道路工程,经验模型,沉降过程,流变特性,黄土高路堤

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Abstract:

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。

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