粉煤灰路堤与常规路堤变形规律对比分析

Comparative analysis on deformation law of fly ash embankment and conventional embankment

为了对比粉煤灰路堤和粘性土路堤沉降规律,运用二维比奥固结有限元理论,采用二维非线性邓肯—张双曲线模型,计算不同路堤高度时路堤沉降变形规律。结果表明,粘性土路堤在同一路堤高度下,沉降变形规律基本和粉煤灰路堤一致,地基中的各种应力都高于同等情况下的粉煤灰路堤。

In order to compare the subsidence law of fly ash embankment and cohesive soil embankment, the paper applies two-dimensional ratio consolidation finite element theory, uses two-dimensional nonlinear Duncan Chang hyperbolic model, and calculates embankment subsidence de- formation law with various embankment height. Results show that： the subsidence deformation law of cohesive embankment is in accordance with that of fly ash embankment under the same height embankment, and the foundation stress is higher than fly ash embankment under similar conditions.