合理确定隔流堤布置参数可以有效改善枢纽敞泄时的通航水流条件。以雅口航运枢纽为例，采用模型试验研究了船闸上游口门区水流条件与隔流堤堤身长度的关系，和堤头线型对其附近连接段通航水流条件的影响。结果表明：随着隔流堤长度的增加口门区最大横向流速先减小后增大，存在最优隔流堤长度以改善口门区通航水流条件；堤头采用等弦长但弧长不同的曲线线型时，堤头附近连接段通航水流条件随曲线弧长的减小逐渐转差，但相应的口门区通航水流条件逐渐转好。%Appropriate dyke length is the promise of good navigation condition in upstream ship lock entrance. Taking Yakou project for example, the relationship between navigation flow condition and length of dyke was investi⁃gated, and then the effect on the flow condition caused by different dyke forms was revealed. Results show that the maximum transverse velocity at the entrance area decreases with the increase of dyke length firstly, and then in⁃creases. There is an optimal length of the separation dyke which can provide favorable flow condition. According to the dyke heads with the same chord length but different arc length, navigation flow conditions around the dyke head become worse when arc length decreases,but the flow conditions in ship lock entrance area gradually become more advantageous.
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