悬挂式防渗墙控制堤基渗透变形发展模型试验

Laboratory model test for evolution of seepage deformation controlled by means of suspended cut-off wall in foundation of dike

在室内比例为1∶40的钢化玻璃模型槽中进行堤基渗透变形模型试验。模拟二元结构堤基在不同防渗墙深度、位置条件下渗透变形的发生、发展过程。测试得到随着渗透变形的发展,堤基内部水头的变化、流量变化以及预留出口出砂面积的变化情况。通过理论分析并结合数值计算,合理的解释了在各个阶段渗透变形通道的发展模式,并评估了当防渗墙处于不同位置时对于抑制渗透变形发展所起到的作用。

A model test in toughened glass flume with a scale of 1：40 is performed to demonstrate the generation and evolution of seepage deformation in embankment foundation with different depths and locations of suspended cutoff wall. The changes of the hydraulic head, the water discharge and the area of the sediment outflow during the experiments are obtained. The mode of the seepage deformation evolution is illuminated by means of theoretical analysis and numerical computation. And the controlling effects of seepage deformation controlled by the cut-off walls in different locations are evaluated.