黄河下游透水桩坝控导效果模型试验研究

通过河工动床模型试验，对沿治导线布设形式的透水桩坝在黄河下游控导河势的效果进行了研究。结果表明：在试验方案及水沙条件下，透水桩坝可以起到较明显的控导作用；坝后过流上滩的水势主要与透水率及坝后滩地落淤状况有关，上滩水量也主要取决于透水率的大小，另外，因桩柱的绕流作用，靠桩根会形成沿坝走向的沟槽，对坝的稳定有一定影响。

Model Test and Study on Control and Guide Effects of Permeable Pile Groynes Situated on the Lower Yellow River

The effects of permeable pile groynes laid out along the thalweg in control and guide the regime of the lower Yellow River have been studied through movable bed model tests. It is shown by the study that permeable pile groynes can play the role of control and guide obviously only for the plan and conditions of water and sediment adopted in the test. The flow behind groynes to the floodplains is mainly related to the permeability rate and deposition status of the floodplain behind groynes. The amount of water of floodplain also depends on permeability rate. In addition, due to the winding flow around piles, it might form pits or ditches at the foot of pile along the groynes that will have a certain effects to the stability of groynes.