基于FLAC3D软件的路堤临界高度数值模拟

NUMERICAL SIMULATION OF CRITICAL HEIGHT OF EMBANKMENT BASED ON FLAC3D SOFTWARE

基于强度折减法理论,运用FLAC3D软件,通过自编强度折减法计算了不同填土高度路堤的稳定安全系数,找出了安全系数为1.1时对应的填土高度,即为稳定控制的临界高度,并与传统公式计算的结果对比分析,对数值模拟确定临界高度的结果进行评价。运用FLAC3D软件进行路堤分级加载过程的数值模拟,通过分析不同填土高度时路堤中心的沉降变化、路堤坡脚的沉降及水平位移变化曲线,得到以变形控制的路堤临界高度,并与稳定控制的临界高度进行对比,说明数值模拟方法的合理性。

Based on the theory of strength reduction method,FLAC3D software is used to calculate the stable safety factors of embankment with different filling heights through self-programming strength reduction method,and the corresponding filling height with a safety factor of 1.1 is found,which is the critical height of stable control.The results of numerical simulation to determine the critical height are compared with those of traditional formulas,and evaluation of the results of numerical simulations to determine critical heights.Moreover,embankment graded loading process was simulated,and the critical height of the embankment controlled by deformation is obtained by analyzing the settlement change of the embankment center,settlement of the embankment slope foot,and the horizontal displacement change curve at different filling heights.The comparison with the critical height of the stability control shows that the numerical simulation method is reasonable.