摘要
在设计结构和考虑有效的海洋工程基础的冲刷防护工程时,了解和预测海洋结构周围的冲刷发展机理是非常重要的。通过波流水槽研究规则波作用下桶形基础的冲刷特性,试验主要考虑波高与结构尺寸对桶形基础周围局部冲刷的影响,并分析波浪冲刷过程中模型周围的时程地形、波浪作用后的冲刷坑性状、冲刷影响要素以及不同结构间的冲刷差异。结果表明:桶形基础的冲刷过程是震荡加深发展,最大冲刷深度与冲刷宽度随波高增大而增加,随上部结构直径增大而增加,最大冲刷深度位置随波高与结构尺寸变化而变化;不同结构间的冲刷坑形态与冲刷后的地形不同,最大冲刷深度相差可高达4倍;桶形基础结构直径比范围为0.2~0.5时,结构自身具有防冲刷能力。
It is very important to understand and predict the scouring development mechanism around ocean structures when designing structures and considering effective scouring protection projects for offshore engineering foundations.In this research,the scouring characteristics of bucket foundation in regular waves are studied by a wave-current flume.The effect of different wave heights and structural sizes on local scour around bucket foundation is mainly considered in the test.We analyze the time dynamic topographic height,scour pit characteristics,scour characterization parameters and scour differences among different structures around the model during wave scouring.The results show that the scouring process of bucket foundation is the development of shock.The maximum scouring depth and width increase with the increase of wave height,the diameter of superstructure and the position of maximum scouring depth change with wave height and structure size.The difference of maximum scouring depth between different structures can be as high as 4.1 times.When the diameter ratio of bucket foundation is between 0.2 to 0.5,the knot will be formed.The structure itself has the ability to prevent scouring.
作者
刘茜茜
陈旭光
冯涛
孙宝石
张凤鹏
田澄
LIU Xixi;CHEN Xuguang;FENG Tao;SUN Baoshi;ZHANG Fengpeng;TIAN Cheng(Ocean University of China,Shandong Provincial Key Laboratory of Ocean Engineering,Qingdao 266100,China)
出处
《海洋工程》
CSCD
北大核心
2019年第6期104-113,121,共11页
The Ocean Engineering
基金
国家自然科学基金优秀青年项目基金(51822904)
国家自然科学基金面上项目(51579082)
中国科协“青年人才托举工程”项目(2016QNRC001)
作者简介
刘茜茜(1994-),女,河北石家庄人,硕士研究生,主要从事海洋工程基础冲刷的研究。E-mail:754504515@qq.com;通信作者:陈旭光。E-mail:chenxuguang1984@ouc.edu.cn。
