【摘要】 为了改善河口平面闸站合建枢纽水闸出流时容易在闸下河道内出现主流集中、偏流、回流,外河航道内横向流速大等问题,提出了在消力池下游海漫段设置八字形低坎的整流措施。基于平面闸站合建枢纽水力学模型试验,对有、无整流措施两种条件下闸下河道的水流流态、流速分布、特征断面流速不均匀系数以及航道内的最大横向流速进行了测试分析与比较。试验结果表明:闸下海漫段设置八字形整流低坎可以使外河入口断面流速不均匀系数从无整流措施的4.5～4.9降低到0.3～1.4,且使外河航道内的横向流速大大降低,模型试验实测的最大横向流速范围在0.30～0.50 m/s之间。外河入口断面流速不均匀系数和外河航道内横向流速的显著降低有助于河口闸站合建枢纽的通航安全,是一种简单而有效的工程措施。更多还原

【Abstract】 In order to improve the discharge flows of a combined sluice-pump station project at estuary,that is,concentration,drift and reflux of the mainstream and increase of transverse velocity in outer river channel,a trapezoid type low ridge in the downstream apron of the stilling basin is proposed.Based on hydraulic model tests on the combined sluice-pump station project,the flow regime,velocity distribution,non-uniform coefficient of characteristic velocity and the maximum transverse velocity in the outer channel through the sluice gate with or without regulation measures are observed and compared.The test results show that the trapezoid type low ridge in the apron will make the non-uniform coefficient of the velocity at the entrance to the outer channel of 4.5-4.9 become 0.3-1.4,and the transverse velocity in the river greatly decreases.The observed range of the maximum transverse velocity is between 0.3 m/s and 0.5 m/s.The significant decrease of the non-uniform coefficient and the maximum transverse velocity may improve the effect of the combined sluice-pump station project at estuary on its navigation safety.The proposed project is a kind of simple and effective engineering measure.更多还原