浅海围栏牧场中柱桩受力及波浪场分布试验

通过物理模型试验的方法,对浅海围栏牧场设施中柱桩的受力及内部波浪场进行了研究。试验模型整体采用1∶20比尺,试验波要素设定五个波高,原型分别为1、2、2.5、3、3.5m,五个波浪周期分别为5、6、7、8、9s,五个流速分别为0.5、0.76、1、1.25、1.57m/s。测量在不同波流组合以及不规则波单独作用和流单独作用下迎浪侧最前方单根桩柱的受力情况及围栏牧场内波浪场情况。试验结果显示,随着波高和流速的增加,桩柱所受到的波流力逐步增大,在计算柱桩受力时,需要考虑到网衣受力带来的影响。波高及周期越大,围栏设施内的波浪场分布规律越明显,沿着波浪传播方向呈逐渐减小趋势,小波高及短周期时波浪场分布规律不明显。

Experiment on the force of column piles and the distribution of internal wave field in shallow sea enclosure ranching

By means of physical model experiment,the force of column piles and internal wave field in the facility of shallow sea enclosure ranching were studied.1∶20 scale was adopted in the whole model of the experiment.Five wave heights were set as factor of wave for experiments,the prototypes were 1 m,2 m,2.5 m,3 m and 3.5 m,respectively.Five wave periods were 5 s,6 s,7 s,8 s and 9 s,respectively.Five velocities were 0.5 m/s,0.76 m/s,1 m/s,1.25 m/s and 1.57 m/s,respectively.The force to the single pile was measured at the front of the waveward side under the different situations of wave-current combinations and irregular wave and current acting alone,internal wave field distribution in shallow sea enclosure ranching.The results showed that,with the increase of wave height,period and velocity,the wave-current forces acting on the pile increased gradually.When calculating the force on pile,it is necessary to take into account the influence of cage net.The larger the wave height and period were,the more obvious the distribution of wave field was in enclosure ranching,that is,along the direction of wave propagation,the wave height tends to decrease gradually.The distribution of wave field is not obvious when the wave height is small or the period is short.