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公路黄土地基流变模型研究

, PP. 15-19

Keywords: 道路工程,黄土地基,静力荷载试验,流变模型,粘弹粘塑性分析

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Abstract:

？为了研究公路黄土地基在上部荷载作用下的蠕变规律、工后沉降以及相应处理措施,通过原位静力荷载试验,对其流变曲线进行粘弹粘塑性分析,并应用附加应力原理,求取一定高度路堤下地基土体的最终沉降变形公式。结果表明:流变曲线主要分初始蠕变和稳定蠕变2个阶段,流变模型包含了粘性、弹性、塑性3个部分,当时间趋于无穷大时,其荷载与应变呈幂函数关系;当路堤高度H≤3m时,可采用一般压实机械处理地基;当3m6m时,应采用重型压实机械处理地基。

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