海洋平台桩基周围冲刷过程及冲刷机理分析

Scour Process Around the Pile Foundation of Marine Platforms and Analysis of Scour Mechanics

对埕岛油田典型平台周边多年的水深地形资料进行分析对比,研究平台桩基周围冲刷过程,探讨桩柱周围形成冲刷坑的冲刷深度、几何形态和分布特征,分析其冲刷机理。结果表明,平台建成初期桩基冲刷剧烈,周围海底形成以平台为中心的盆状地形,经历近1年的时间逐步达到冲淤平衡。冲刷坑形态特征主要由水动力条件控制。

To study the scour process of platform pile foundation, the water depth data over a number of years for typical platform circumjacent zones of Chengdao Oil Field were analyzed. The shape and distribution character of scour pits around piles were discussed and the scour mechanics of pile foundation was analyzed. The results indicated that the pile foundation scoured significantly at the initial stage, the seafloor around the platform became basin-shaped and the platform pile foundation achieved scour-and-fill equilibrium after one year. The shape character of scour pits was controlled by hydrodynamic conditions.