基于三维数值模拟的高填方边坡强夯效应研究

根据某拟建变电站高填方边坡地质资料建立三维数值计算模型,计算分析不同夯击能和夯击位置条件下边坡土体的竖向位移、水平位移和加速度等响应随动力时间的变化规律.不同工况下的计算结果表明:夯击主要影响表层土体,夯击能越大夯击区域表层土体位移越大,不同夯击能下土体影响区变化较小;夯击引起的土体加速度峰值随夯击能的增大而增大;夯击点离边坡面越远,夯击影响区有所增大而夯沉量有所减小,且边坡顶部和边坡面中部水平位移下降十分显著.研究结论可为类似高填方边坡工程强夯施工设计提供参考.

Dynamic compaction effects of high-fill slope based on three-dimensional numerical simulation

According to the geological information of a proposed substation, a three-dimensional numerical model is established to calculate and analyze the variation of vertical displacement, horizontal displacement and acceleration of slope soil with dynamic time under different ramming energy and ramming position conditions. The calculation results under different conditions show that the increase of ramming energy mainly leads to the increase of surface soil displacement, and the change of ramming influence zone under different ramming energy is small. The peak acceleration of soil caused by ramming increases with the increase of ramming energy. As the ramming point is far away from the slope surface, the ramming influence zone increases, but the maximum vertical displacement decreases and the horizontal displacement of the top and the middle of the slope surface decreases very significantly. The conclusions in this study can provide reference and guidance to the design of ramming construction for similar high-fill slope projects.