沉管隧道管节干舷设计值计算的影响因素与灵敏度分析

Influencing Factors and Sensitivity Analysis on Freeboard Design Value Calculation of Immersed Tunnel Segments

为确保沉管隧道在浮运作业窗口期的稳定性与安全性,采用设计合理的管节干舷至关重要。文章依托沉管隧道项目的设计方案,研究沉管干舷设计值对结构形状、管节长度、结构容重、水体容重、附加结构质量等影响因素变化的敏感程度,并对干舷设计值进行灵敏度分析,进而得到影响设计干舷的关键因素。研究结果可以为沉管结构的设计与选型提供参考依据和理论指导。

In order to ensure the stability and safety of immersed tunnel during the window period of floating operation,it is very important to adopt a reasonably designed segment freeboard.Based on the design scheme of immersed tunnel project,the sensitivity of the design value of immersed tube freeboard to changes of influencing factors such as structural shape,segment length,structural volumetric weight,water volumetric weight and additional structural quality is studied,and the sensitivity analysis is conducted on the design value of the freeboard to obtain the key factors affecting the designed freeboard.The research results can provide reference and theoretical guidance for the design and selection of immersed tube structures.