沉管隧道长大管节海上施工物理模型试验思路与结果分析  

New thought of physic model test and result study on immersed tube tunnel element construction

作　　者：梁邦炎[1] 卢普伟[1] 

机构地区：[1]中交第四航务工程局有限公司,广东广州510231

出　　处：《水运工程》2013年第6期170-176,共7页Port & Waterway Engineering

基　　金：国家科技支撑计划项目(2011BAG07B01)

摘　　要：长大管节海上寄放、浮运和沉放过程中的受力和运动响应是沉管施工需要考虑的重要参数,现有的结构力学和流体力学均无法精确计算。基于相似理论和相对运动概念,在拖曳水池完成了沉管管节寄放、浮运和沉放系列水动力学试验,得到了沉管管节在不同风浪流载荷组合作用下的管节受力和运动响应,可为数值仿真分析提供关键参数取值依据,也可为长大管节的施工提供借鉴。The force and motion response of the immersed tube tunnel element aren important parameters of immersed tunnel construction. The immersed tube tunnel element that deposit, float and sink to the sea bed is the world＇s longest and widest immersed tunnel. We can＇t calculate it accurately using the computational structural mechanics and the computational fluid dynamic. In order to study the hydrodynamic behaviors of element during its construction, we carry out a scaled model test to investigate the motion responses of the tunnel element in the immersion under wave and obtain current actions and tensions acting on the controlling cables of its immersing system based on the similarity theory, which may serve as a basis for the key parameters in the numerical simulation analysis, and a guidance to the construction of the immersed tunnel.

关 键 词：沉管 寄放 浮运 沉放 缆力 运动响应 

分 类 号：U655.4[交通运输工程—港口、海岸及近海工程]