异型群桩水流载荷遮掩效应受力分析  

Force analysis of isomerism pile group under flow load shielding effect

作　　者：韩鹏鹏 林红星[1,2,3] 仇正中 高宁波[2,3,4] HAN Pengpeng;LIN Hongxing;CHOU Zhengzhong;GAO Ningbo(CCCC Second Harbor Engineering Company Ltd.,Wuhan 430040,China;Key Laboratory of Large-Span Bridge Construction Technology,Wuhan 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430040,China;CCCC Highway Bridge Construction National Engineering Research Center Co.,Ltd.,Wuhan 430040,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]中交公路长大桥建设国家工程研究中心有限公司,湖北武汉430040

出　　处：《水运工程》2023年第4期32-38,90,共8页Port & Waterway Engineering

摘　　要：中马友谊大桥采用群桩基础,洋流经过群桩时会产生纵向和横向位移。为了探索异型群桩水流载荷计算方法,通过单向水槽模型试验测量单桩、双桩水流载荷,提出异型群桩水流载荷公式,并结合群桩水流载荷试验结果验证计算公式的合理性。结果表明,并列双桩水流载荷随着桩心距增加而减小,桩心距大于5 D时,双桩之间干扰效应消失;串联双桩中后桩水流载荷随着桩心距增加而增加,桩心距大于20 D时,双桩之间遮掩效应减弱;随着流向角增加,后桩受到的水流载荷呈正弦分布,且随着桩心距变化出现不同趋势。China-Maldives Friendship Bridge adopts a pile group foundation,and vertical and horizontal displacements appear when the ocean current passes the pile group.In order to explore the calculation method of the flow load of the isomerism pile group,this paper measures the flow load of single and double piles by a one-way tank model test,proposes a formula for the flow load of the isomerism pile group,and verifies the rationality of the formula according to the test results of flow load of pile group.The results show that the flow load of the parallel two piles decreases with the increase in the pile center distance,and the interference effect between the two piles disappears when the pile center distance is greater than 5 D.In addition,the flow load of the back pile of two piles in series increases with the increase in the pile center distance,and the shielding effect between the two piles weakens when the pile center distance is greater than 20 D.With the increase in the angle of current,the flow load of the back pile presents a sinusoidal distribution,and different trends appear with the change of pile center distance.

关 键 词：水流载荷 异型群桩 桩心距 遮掩系数 

分 类 号：U656[交通运输工程—港口、海岸及近海工程] TV13[交通运输工程—船舶与海洋工程]