我国悬浮隧道水动力特性及模型试验研究进展

Research Progress on Hydrodynamic Characteristics and Model Test of Submerged Floating Tunnel in China

悬浮隧道是一种跨越深大水域的新型交通方案,在地质条件差和环境保护要求高的水域优势突显,成为最具竞争力的跨海通道形式,引起了国内外学者的广泛关注。简要介绍了悬浮隧道的结构特点与研究概况,重点梳理了国内学者在悬浮隧道的水动力特性与动力响应、锚索涡激振动及控制和模型试验研究方面的研究成果,并对需进一步研究的问题进行展望。分析表明:1)已有研究普遍采用欧拉梁和弹性支承梁模型分析管体的动力响应,锚索的计算大多采用无质量的弹簧或受拉的杆单元;2)环境荷载集中于均匀流与规则波,模型试验以小比尺节段模型试验为主;3)波-流-交通耦合荷载或极端波流荷载作用下的动力响应、大比尺多管节模型试验将是未来的发展方向。

Submerged Floating Tunnel(SFT)is a new transportation scheme that crosses deep and large areas of water.It has become the most competitive form of the cross-sea channel due to its apparent advantages in the water area with poor geological conditions and high environmental protection requirements,which has attracted wide attention at home and abroad.This paper briefly introduced structural characteristics and research overview of SFT and focused on the research results of domestic scholars on the hydrodynamic characteristics and dynamic response,vortex-induced vibration of anchor cable,and model test study.Finally,the issues that need further study were discussed.The analysis shows that:1)The Euler beam and elastic support beam models are widely used to analyze the dynamic response of tubes,and the calculation of anchor cables mostly adopts massless spring or tensioned rod units;2)The environmental loads are concentrated on uniform flow and regular waves,and the model tests are mainly focused on small scale segment model tests;3)The dynamic response under coupled wave-flow-traffic loads or extreme wave-flow loads,and large scale multi-segment model tests will be the future development trend.