京沪高铁隧道洞门气动特性分析  

Analysis on Aerodynamic Characteristics of Tunnel Portal at Beijing-Shanghai Express Railway

作　　者：赵文成[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《路基工程》2013年第3期114-116,121,共4页Subgrade Engineering

基　　金：铁道部科技研究开发计划:高速铁路双线隧道缓冲结构深化研究(2010G018-C-2-1)

摘　　要：在高速铁路建设中,隧道出口微压波控制是要考虑的重要课题之一。结合京沪高铁的西渴马二号隧道,对隧道洞口缓冲结构的设置参数进行了数值分析,评价了削竹结构和顶部开口结构在单一设置和组合设置情况下,对缓解微压波的效果。分析结果表明:开口式缓冲结构效果更好;组合缓冲结构的优化参数不可照搬单一设置时的优化参数。同时,通过分析,也证明了计算工况所采用的缓冲结构参数是科学合理的。In the course of high-speed railway building, controlling micro-pressure wave around tunnel exit is one of the problems that should be considered seriously. This paper, combining with the project of Xikema Tunnel 2 on Beijing-Shanghai high-speed railway, carried out numeral simulation in relation to parameter settings of buffer structure of the tunnel portal, and then assessed the effect of bamboo-truncating portal, top- opening hood and their combination on relief efficiency of micro-pressure wave respectively. The results show that as regards the relief efficiency, top-opening structure is better, and the optimized parameters of the combined buffer structure shall not simply copy those of the single structure; at the same time, through analysis, the results also indicate that the parameters of the buffer structure used in these cases are scientific and reasonable.

关 键 词：隧道 缓冲结构 微压波 压力梯度 

分 类 号：U451.3[建筑科学—桥梁与隧道工程]