复杂艰险山区高速铁路隧道群空气动力学效应及缓解措施

为解决复杂艰险山区高速铁路隧道群设计难题,本文从压力波动、空气阻力和微气压波几方面入手,明确了隧道群空气动力学效应与单个隧道的差异,阐述了隧道群空气动力学效应的变化规律,提出了相应的缓解措施以及隧道群连接明洞的设置原则。研究结果表明,隧道群空气动力学效应与单个隧道在微气压波方面的差异最大,在条件适宜的情况下,应考虑采用连接明洞的方式缓解隧道群空气动力学效应。同时,本文建议制定适合中国国情的隧道群复合型耳膜舒适度标准和微气压波标准,并在确定隧道群缓冲结构、横通道等结构设计参数时,重视数值模拟所发挥的指导作用。

Aerodynamic Effects and Alleviative Measures of High Speed Railway Tunnel Group in Complex and Dangerous Mountainous Regions

In order to solve the design problem of high-speed railway tunnel group in complex and dangerous mountain areas,the difference between the aerodynamic effect of tunnel group and that of single tunnel is clarified from the aspects of pressure fluctuation,air resistance and micro pressure wave,the variation law of the aerodynamic effect of tunnel group is expounded,and the corresponding alleviative measures and the setting principle of tunnel group connecting open hole are put forward.The results show that the aerodynamic effect of tunnel group is the most difference from that of single tunnel in the micro pressure wave,and the method of connecting open holes should be considered to alleviate the aerodynamic effect of tunnel group when the conditions are allowed.In this paper,it is suggested to establish composite ear drum comfort and micro pressure wave standard suitable for tunnel group in China,and emphasize the guiding role of numerical simulation in determining design parameters for tunnel group buffer structure and transverse channel.