路基柔性挡墙受力机理的有限元分析

FEM analysis of multistage flexible retaining wall reinforced with geocell

以广泛应用于瑞鹰高速路基边坡的土工格室柔性挡墙工程为背景,通过有限元方法建立计算模型,研究土工格室多级柔性挡墙的受力机理.考虑墙体与路基土的耦合关系,对比多级挡墙在多种工况下的受力情况.结果表明:多级柔性挡墙与单级柔性挡墙的受力有显著差异,墙体越厚、坡度越大、表面荷载越小时墙体受力越小越利于边坡稳定;当边坡较高时,宜采用更多级数的挡墙,且挡墙台阶上部、下部墙高在较小比例下受力较为合理.

Based on the research background of geocell flexible retaining wall engineer which has been widely applied on Ruiying highway subgrade slope,the multistage load-bearing mechanism of geocell flexible retaining wall is investigated by the finite element method of establishing the calculation model.Considering the coupling relation between the wall and the foundation soil and contrasting the multistage retaining wall in various situations,the result shows that there were significant differences between the force of multistage flexible retaining wall and single-stage flexible retaining wall,when the wall is thicker and the gradient is greater,the pressure against the wall becomes smaller,which is better for the stability on the slope wall.When the slope is higher,the multistage retaining wall should be used and the wall height of the upper and lower part on retaining wall in smaller proportion is more reasonable.