沉箱孤立墩式结构整体稳定性一般规律

General pattern of the overall stability of separate caisson dolphin structures

大型原油码头多采用墩式蝶型布置,一般情况下波浪作用是控制沉箱墩式结构整体稳定性的主要外荷载。作为设计波要素,通常选取最大波高及其对应的波周期或最大波周期及其对应的波高进行结构计算,但经多组波要素对比计算表明,并非最大波高或最大波周期为控制工况。参考数模分析群桩系数随波周期变化的成果,研究了作用于小尺度墩柱上的波浪作用随波周期和波高的变化以及沉箱孤立墩式结构整体稳定性的一般规律。

Large-scale oil wharves usually adopt the layout of butterfly.Generally, the critical loading relating to the overall structure stability is the wave loading.Typically, the maximum wave height and its corresponding wave period or the maximum wave period and its corresponding wave height are chosen are the design wave parameters. However, it is indicated by calculations that those are not necessarily the critical condition regarding the wave parameters.By reference to the numerical analysis result of the factor of pile group, this paper studies the change of wave loading on small-scale pier column structure with different wave heights and wave periods, and also studies the general pattern of the overall stability of separate caisson dolphin structures.