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.
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)
关键词
隧道
缓冲结构
微压波
压力梯度
tunnel, buffer structure
micro-pressure wave
pressure gradient
