Floating bridges are the practical answers for intersection enormous waterways with unordinary depth and exceptionally soft bottom where conventional piers are impractical. This paper describes experimentally the stability of bed material underneath the floating bridges under different hydraulic conditions introduced regarding flow discharge, tailgate water depth, the bridge length and the bridge draft for different loads over the bridge. Two distinctive bed materials are utilized to characterize the bed morphological changes. One hundred and sixty-eight tests are completed and the results are differentiated to the basic case where no bridges are introduced. The outcomes reveal that the particles size of bed material and the bridge draft are the dominant parameters that influence the bed morphology and flow attributes.

浮桥是将巨大水道与不寻常的深度和异常柔软的底部相交的实用答案，而常规码头则是不现实的。本文通过实验描述了在不同水力条件下浮桥下面的床层材料的稳定性，这些条件涉及流量，后挡板水深，桥长和桥上吃水量对桥上不同载荷的影响。利用两种独特的床材料来表征床的形态变化。完成了168次测试，结果与没有引入任何桥梁的基本情况有所不同。结果表明，床层材料的粒径和桥流是影响床层形态和流动属性的主要参数。