摘要
在试验室水槽中进行了有悬挂式防渗墙的砂质堤基的渗流模型管涌试验,取得了不同贯入度悬挂防渗墙防止管涌效果的系列试验成果,论证了悬挂式防渗墙对覆盖土层下粉细砂地基发生管涌时有截断通道、控制管涌发展的显著功效。根据试验资料确定了悬挂式防渗墙及其前后水平段的渗流临界坡降,给出了管涌险情是否会影响大堤安全的估算公式。
The model test on effect of suspended cut-off wall on controlling the piping in sandy foundation of levee was carried out in a flume. The experimental results for different suspension depths were obtained. It is found that the cut-off wall can effectively block the piping passage in silt-sandy layer and control the development of piping. The critical seepage gradients of the cut-off walls are obtained according to the experimental data. The formula for assessing the influence of piping on safety of levee is proposed.
出处
《水利学报》
EI
CSCD
北大核心
2005年第1期42-50,共9页
Journal of Hydraulic Engineering
关键词
堤防
管涌
悬挂式墙
砂模型试验
临界坡降
levee
piping
suspended cut-off wall
model test
critical seepage gradient
