摘要
文章结合内河沉管隧道管节浮运的特点,建立了管节浮运运动模型和拖缆张力计算模型,给出了管节浮运的水力学计算公式,分别对管节在静水、不同流速及不同流向角下的浮运进行了计算模拟,并对特定干舷下管节浮运的浮态及稳定性进行了分析。研究结果表明,建立的计算模型适用于沉管管节内河浮运的水力特性模拟及稳定性分析,水流速度和流向角对浮运时管节的横荡和首摇的摆动幅值及频率均有明显影响,管节浮运应尽可能避免在横流下进行。研究成果可为内河沉管隧道管节的浮运施工提供理论指导。
In light of the characteristics of floating transportation for elements of an immersed tunnel in an inland river, an element-floating motion model and a cable tension calculation model are established and hydraulic calculation formulas for floating transportation are given. The floating transportation of elements in still water and water with different flow rates and different flow angles are simulated and calculated. The floating state and stability of elements during floating transportation are analyzed for a certain freeboard. Results show the established model is applicable to simulating the hydraulic characteristics and stability analysis of an immersed tunnel element during floating transportation in an inland river. The flow rate and flow angle have significant effects on the amplitude and frequency of the swing and the first roll of elements during floating transportation, and transporting elements in a crossflow direction should be avoided as much as possible.
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第1期170-177,共8页
Modern Tunnelling Technology
基金
国家自然科学基金(41572255)
上海市自然科学基金项目(15ZR1423300)
关键词
沉管隧道
浮运
水力学特性
稳定性分析
计算模型
摆动幅值
Immersed tunnel
Floating transportation
model
Swing amplitude Hydraulic characteristics
Stability analysis
Calculation
