管袋堤坝在水流作用下的稳定性模型试验

Experiment on the stability of geotube embankments in river current

通过水流作用下管袋堤坝的稳定性模型试验,对边坡坡比、坝高对管袋堤坝稳定性的影响进行了研究.试验结果表明:随着边坡坡比的增大,其所对应的临界作用流速、临界坝顶水深及临界垂线平均流速均有增大的趋势;随着堤体坝高的增加,其所对应的临界作用流速、临界坝顶水深及临界垂线平均流速均有减小的趋势.在试验结果的基础上分析了水流作用下管袋堤坝的稳定公式.分析结果表明:随着边坡坡比的增大,管袋堤坝的稳定性有所提高;管袋堤坝坝高的增加却导致了其过水稳定性的降低.

The stability of geotube embankments with different slope ratios and heights in river current is studied in this paper through a series of model tests. It can be seen from the results of the tests that the critical current velocity, critical vertically averaged velocity and critical water depth above the top of the embankment increase along with the slope ratio and decrease with any increase in the embankment height. Also, the stability fomlula for geotube embankments in the river current is analyzed on the basis of the experimental results. This shows that the stability of geotube embankments increases when the slope ratio increases, and decreases when the height of the embankment increases.