波浪作用下空心块体稳定性分析初探

通过二维物理模型试验,探讨了暗基床上空心块体在规则波作用下的失稳模式。通过试验观察发现,当空心块体内有一定高度的填料时,波浪正向作用下空心块体首先倾覆失稳。本试验测量了作用在空心块体上的波浪力,并与同尺寸沉箱所受的波浪力进行对比,结果显示在波峰时空心块体所受的总水平波浪力比相同波浪作用下的沉箱所受力小而波谷作用下空心块体所受的总水平波浪力却比相同波浪作用下的沉箱所受波浪力大。鉴于上述实验观察结果,空心块体的主要失稳模式分析方法应作进一步研究。

STUDY ON THE STABILIZATION OF THE HOLLOW BLOCK UNDER WAVE ACTION

The stabilization model about the hollow block placed on the rubble foundation is investigated in the wave flume under regular wave's action.Under given water depth condition,it is known that the wave forces normally acting on the hollow block lead them to vibrate and the filled rocks flow outside the hollow block so that the hollow block overturns when the height of the filled rock keeps constant.The wave pressure distribution and the total horizontal wave forces on them are measured.At the same time,the wave forces and pressures on the caissons are measured under the same wave condition.The results show that the crest wave forces on caissons are greater than them on the hollow block,and the trough wave forces on the hollow block are greater than them on the caissons.Thus,the stabilization analysis on the hollow block is different from the caisson.It is need to do deeper research on the stabilization model and the wave forces acting on them.