基于FLAC3D的粉煤灰路堤稳定性分析

Stability Analysis of Fly Ash Embankment with FLAC 3D

路堤稳定性研究一直是公路工程的重点研究内容。为分析粉煤灰路堤的稳定性特征,利用FLAC 3D数值模拟软件,建立了粉煤灰路堤稳定性的数值计算模型,分析了填筑高度和边坡斜率对粉煤灰路堤稳定性的影响规律。研究结果表明:(1)粉煤灰路堤在车辆行驶条件下具有较好的稳定性;(2)路堤填筑高度越高,粉煤灰路堤边坡斜率也应设置越高,建议粉煤灰路堤填筑高度小于8m;(3)通过提高边坡斜率的方法来保证路堤边坡的稳定,但最大边坡斜率不宜超过1.5。

The research on the stability of embankment is always the key research contents of road engineering.In order to analyze the stability characteristics of fly ash embankment,FLAC 3D numerical simulation software was used to establish a numerical calculation model for the stability of fly ash embankment,and the influence of filling height and the slope of side on the stability of fly ash embankment was analyzed.The results showed that:(1)the fly ash embankment has good stability under the condition of vehicle running.(2)The higher the embankment filling height is,the higher the slope of fly ash embankment slope should be set.It is suggested that the height of fly ash embankment filling should be less than 8m(.3)To ensure the stability of embankment slope by increasing the slop,but the maximum slope.should not exceed 1.5.