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由于渤海近岸流冰的运动速度和尺寸较小,具有的动能也较小,所以其对结构物的作用形式主要是撞击,而不是挤压。为了得到合理的近岸码头排桩设计冰力,利用实验室模拟水流带动一定质量的模型冰块以一定速度撞击码头排桩模型,获得作用于一榀码头排桩上单桩或同时作用于群桩上的试验冰力。系列试验结果表明冰力的上限值随流冰压缩强度和动能增加而增加,并趋向一定值。经过数学统计,得到作用在单桩上冰力上限值同流冰动能和压缩强度之间的试验关系。该关系将流冰的尺寸、厚度、密度、运动速度、压缩强度同单桩上冰力上限值结合起来,作为流冰对单桩设计冰撞击力的基础,具有普适性意义。此外,还结合渤海具体码头工程,用该试验成果评估作用在一榀码头排架单桩上冰力和整体排架结构总冰力。
Because of the small velocity and the small size of the ice movement in the coastal area of the Bohai Sea, and with less kinetic energy, the effect on the structure is mainly impact instead of squeezing. In order to obtain a reasonable ice force for the design of row piles near nearshore, a model ice cube of a certain quality is simulated by a laboratory to impinge on the pier piles model at a certain speed to obtain a single piles acting on the piles of one pylon or simultaneously acting on the groups Test ice force on pile. The series of experimental results show that the upper limit of ice force increases with the increase of compressive strength and kinetic energy, and tends to a certain value. Through mathematical statistics, the experimental relationship between the kinetic energy and the compressive strength of frozen ice on the single pile is obtained. This relationship combines the size, thickness, density, velocity and compressive strength of ice with the upper limit of ice force on a single pile. As a basis for ice-impact design of single pile, ice flow has universal significance. In addition, the Bohai Sea specific wharf project is also combined with the test results to evaluate the ice force acting on the single pile of a wharf and the total ice force of the whole pitching structure.