FLAC3D数值模拟在路基施工中的应用

Application of FLAC3D Numerical simulation in the subgrade construction

为找出路基施工过程中的变形影响因素,运用FLAC3D软件进行数值模拟分析路基中心和坡脚的变形,研究在不同填土干密度、弹性模量和泊松比的条件下,路基中心处竖向沉降和路基坡脚处的水平侧向位移随路基填土高度的变化情况.研究结果表明:对沉降影响因素排序为干密度>弹性模量>泊松比,而对侧向位移的变化很小可以忽略不计.因此在满足规范要求的条件下,尽可能的选用干密度小的填土或提高路堤弹性模量,能够改善公路沉降变形.

In order to find out the influencing factors of the deformation process of the subgrade construction, the vertical settlement of the center subgrade and the level lateral displacement at toe of subgrade foot is analyzed with filling height changes under the condition of different filling dry density, elastic modulus and Poisson's ratio by using FLAC3D numerical simulation software. The conclusion is that the factors of settlement ranking: dry density>elastic modulus >Poisson's ratio, and the change to the lateral displacement is negligible. Therefore, use of less dry density filler or increased embankment elastic modulus can improve the highway settlement deformation under the regulatory requirements conditions.