摘要
兰新铁路第二双线穿过著名的百里风区、三十里风区,其风害极为严重。为了最大限度地减少限速和停轮,在百里风区的核心区采用设置防风明洞的防护措施。通过CFD数值模拟与风洞模型试验研究,得出了作用在防风明洞表面的风荷载随风速增大而增大,且迎风侧为正压、背风侧及拱顶为负压的分布规律。
The second double-tracked Lanzhou-Xinjiang Railway passes through the famous“100 km wind zone” and“30 km wind zone” where the wind hazards are very serious. Therefore, in order to minimize both speed limitaiton and wheel stopping, the anti-wind opencut tunnel was installed as a prevention measure at the core area of“100 km wind zone”. In this study, after the CFD numerical simulation as well as wind-tunnel model experiment and research, the distribution pattern of wind load acting on the anti-wind opencut tunnel surface was ascertained as follows： the wind load will increase with the increasing of wind speed;the wind load presentes positive pressure on the windward side, and presents negative pressure on the leeward side and on the arch crown.
出处
《铁道标准设计》
北大核心
2014年第4期61-64,共4页
Railway Standard Design
关键词
防风明洞
风荷载
分布规律
anti-wind opencut tunnel
wind load
distribution pattern
