水位变化对沿湖路堤边坡渗流特征及稳定性的影响

Influence of Water Level Change on the Seepage Characteristics and Stability of an Embankment Slope Along the Lake

随着我国公路工程的迅速发展,沿湖路堤边坡失稳问题也日益凸显。借助Plaxis有限元分析软件,建立二维平面分析模型,考虑了不同水位升降速度对沿湖路堤边坡的渗流特征及稳定性的影响。结果表明:在水位上升阶段,坡内浸润线呈下凹状,坡内渗流速率呈现出先增大后减小的趋势,而边坡稳定性系数先略减小后增大;在下降阶段,坡内浸润线呈上凸状,坡内渗流速率呈现出先增大后减小的趋势,稳定性系数先减小后略增大。由此,获得在水位变化工况下沿湖路堤边坡渗流特征及稳定性的变化规律,可为之后类似边坡工程的防护设计提供参考。

With the rapid development of Highway Engineering in China, the slope instability of the embankment along the lake has become increasingly prominent. In this paper, the PLAXIS finite element analysis software is used to establish a two-dimensional plane strain analysis model, considering the influence of different water level rise and fall speed on the seepage characteristics and the stability of the embankment slope along the lake. The results show that: in the rising stage of water level, the infiltration line in the slope is concave, the seepage rate in the slope increases first and then decreases, and the slope stability coefficient decreases first and then increases;in the falling stage, the infiltration line in the slope is convex, the seepage rate in the slope increases first and then decreases, and the stability coefficient decreases first and then increases slightly. Thus, the change law of seepage characteristics and stability of Yanhu embankment slope under the condition of water level change is obtained, which can provide reference for the protection design of similar slope engineering in the future.