沉管浮运时船管连接支墩受力分析  

Force analysis on ship-pipe connection buttress during floating transportation of immersed tubes

作　　者：岳长喜 寇晓强[1,2,3] 于长一 YUE Chang-xi;KOU Xiao-qiang;YU Chang-yi(CCCC Tianjin Port Engineering Institute Co.,Ltd.of CCCC First Harbour Engineering Co.,Ltd.,Tianjin 300222,China;CCCC First Harbour Engineering Co.,Ltd.,Tianjin 300461,China;Tianjin Key Laboratory of Construction,Operation and Maintenance Technologies for Underwater Tunnels,Tianjin 300461,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222 [2]中交第一航务工程局有限公司,天津300461 [3]天津市水下隧道建设与运维技术企业重点实验室,天津300461

出　　处：《中国港湾建设》2024年第11期72-77,共6页China Harbour Engineering

摘　　要：鉴于首次使用一体船浮运安装沉管,船管连接处支墩受力无法直接测量,且尚无相关工程经验可供参考。文章通过支墩受力数值仿真分析,确定沉管浮运期间支墩应力特征点,建立支墩竖向压力和水平压力与特征点应力之间的关系,提出了一种新的测量船管连接的支墩受力方法。研究结果表明,在一体船浮运沉管的过程中,船首支墩竖向压力逐渐上升,船中支墩竖向压力略有下降,船尾支墩竖向压力变化不大;支墩水平压力与航速成正相关,在高速行驶中,支墩水平方向始终受力较大;船舶减速行驶时,支墩主要受惯性力影响,其受力方向发生转向,需要引起重视。In view of the first use of an integrated ship for floating installation of immersed tubes,it is not possible to directly measure the force on the buttress at the ship-pipe connection,and there is no relevant engineering experience for reference.This paper uses numerical simulation analysis of buttress forces to determine stress characteristic points during immersed tubes transportation,establishes a relationship between vertical and horizontal pressures of buttresses and stress at characteristic points,and proposes a new method for measuring forces on ship-pipe connections.The study shows that during the process of using an integrated ship to transport immersed tubes,the vertical pressure on the bow buttresses gradually increases while there is a slight decrease in vertical pressure on mid-ship buttresses;there is little change in vertical pressure on stern buttresses.Horizontal pressure on buttresses is positively correlated with speed;during high-speed travel,there is consistently greater force exerted in the horizontal direction.When decelerating,inertia forces mainly affect the buttresses causing changes in force direction which require attention.

关 键 词：一体船 浮运 支墩 水平力 竖向力 

分 类 号：U674.3[交通运输工程—船舶及航道工程] U459.5[交通运输工程—船舶与海洋工程]