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借助大型原位试验,研究了黄土高路堤自身沉降过程受地形条件、填土高度、施工速率的影响及层间填土相对位移的变化特征,进而获得了黄土高路堤施工过程不同阶段的沉降过程及其发展变化规律。研究表明:路堤沉降分布不仅受填土荷载大小及地形条件影响,而且受填土速率影响也较大;路堤施工期沉降随填土增加呈近似线性变化,工后沉降随时间呈负对数曲线关系,并受到填土(加荷)速率的直接影响;路堤填土自身沉降以施工期沉降所占比重较大,最大值发生在路堤1/3～1/2高度范围内。
By means of large-scale in-situ tests, the subsidence process of loess high embankment is studied by the influence of topography, filling height and construction rate and the relative displacement of filling soil. The subsidence process of loess high embankment at different stages is obtained And its development and changes. The research shows that the embankment settlement distribution is affected not only by the size and the topography of the fill, but also by the fill rate. The settlement of the embankment shows an approximate linear change with the increase of the fill, and the settlement after construction shows a negative logarithmic curve with time And directly affected by the rate of filling (loading). The subsidence of embankment fill itself takes up a large proportion of the settlement during the construction period, and the maximum occurs within the range of 1 / 3-1 / 2 of the embankment.