基于ABAQUS仿真分析的高填粗粒土路基边坡稳定性研究

Study of the Stability of High Fill Coarse Grained Subgrade Slope Based on the ABAQUS Simulation Analysis

高填方粘性土边坡的稳定性以往研究较多,为了研究变形特性与强度都不同于粘性土的高填方粗粒土边坡,运用ABAQUS软件,采用强度折减法对多级加筋粗粒土边坡工程做了有限元数值模拟,分析了整个边坡的稳定性。研究结果表明,加筋不仅提高了各个台阶的局部稳定性,也加强了边坡的整体稳定;边坡中都存在水平位移,最大值出现在边坡底部坡脚附近,在坡脚处出现小部分沿x轴正向的负位移;水平位移随着填土高度的增加而减小,第一台阶的水平位移最大;越靠近边坡,土工格栅和土体的位移均越大,变大的趋势近似一致,但土体的水平位移明显大于土工格栅的水平位移。

The research of the stability of high fill cohesive soil slope was more in the past. In order to study high fill coarse grained soil slope which is different from cohesive soil on the deformation and strength, using software ABAQUS, the multilevel rein forced soil slope was finite element numerical simulated with strength reduction theory and the stability of the whole slope was ana- lyzed The results show that, the reinforced not only improves local stability of each step, but also strengthens the integral stability of slope; the slope has horizontal displacement. The maximum value appears in the slope bottom near the slope toe. And a part of negative displacement appears along the positive X axis; horizontal displacement reduces with the filling height increasing. The largest horizontal displacement is in the first step; closer to the slope, the geogrid and soil displacement are bigger. The trend of becoming large is approximate alignment. But the soil horizontal displacement is significantly greater than the geogrid horizontal displacement.