复杂波浪条件下海底管线冲刷深度实验研究  

Experimental research on scour depth of submarine pipelines under complex wave conditions

作　　者：张靖[1] 拾兵[1] 赵恩金[1] 刘静[1] 

机构地区：[1]中国海洋大学工程学院,青岛266100

出　　处：《水动力学研究与进展（A辑）》2015年第2期123-128,共6页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(51279189)~~

摘　　要：海底管线冲刷深度一直是该领域关注的焦点问题。现有的海底管线冲刷深度计算公式大多仅适用于单一波浪作用下且波浪方向垂直于管线,而在实际情况中,不同方向的波浪联合作用在管线引起管线冲刷。该文以秦皇岛海域实测多年波浪为依据,进行了不同管线铺设角度等复杂波浪条件下的冲刷实验。实验结果表明,在复杂波浪条件下,管线上下游压力差随着管线角度的增大而增大,导致冲刷深度的增大;现有管线相对冲刷深度的经验公式不能用来估算冲坑深度。并且通过对实验结果的回归分析,得到了复杂波浪条件下海底管线冲刷深度估算的经验公式。The equivalent scour depth of submarine pipelines is always the key point in this field. Almost all existing formulas about scour depth of submarine pipelines have been tested only in unidirectional wave conditions and few formulas are about the skewed pipelines. But in fact, wave comes out from all the directions. They joint forces on the pipeline. Based on field data of Qinhuang Island sea area, this paper studies on submarine pipelines scour in different wave directions, different orientation of pipelines and different wave factors. It can be shown in the test that under the complex wave conditions, the pressure difference increases with the angle increasing, and that will make the scour hole deeper. According to the research, the existing formulas about the relative scour depth are not suitable under the complex wave conditions. An experimental formula about scour depth under complex wave conditions has been worked out by using regression analysis.

关 键 词：复杂波浪 海底管线 冲刷深度 管线铺设角度 回归分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]