兰新二线防风明洞遮蔽性能分析  

Analysis of the Wind-blocking Performance of the Anti-wind Open Cut Tunnel along the Lanzhou-Xinjiang Second Railway Line

作　　者：霍卿[1] 许建林[1] 杨永刚[1] HUO Qing, XU Jian-lin, YANG Yong-gang(Gansu Province Railway Transportation Mechanics Application Engineering Laboratory, Lanzhou Jiaotong University, Lanzhou 730070, China)

机构地区：[1]兰州交通大学甘肃省轨道交通力学应用工程实验室,甘肃兰州730070

出　　处：《兰州交通大学学报》2018年第3期85-92,共8页Journal of Lanzhou Jiaotong University

基　　金：中国铁路总公司兰新铁路第二双线大风条件下行车安全专项试验项目(Z2014-034)

摘　　要：基于三维数值模拟软件STAR-CCM+,针对兰新二线防风明洞的风环境,考虑无车情况下防风明洞毗邻建筑、地貌等的影响前提下,研究了不同位置、不同风速、上下行线路、不同风向角,对防风明洞的来流风速遮蔽效果的影响进行了分析.结果表明:防风明洞中段遮蔽效果最强,乌鲁木齐端最弱.来流风速增大时,明洞遮蔽效果会减弱,且对乌鲁木齐一端的影响较大.随着风向角的增大,防风明洞的遮蔽效果成非线性增强趋势.Based on the three-dimensional numerical simulation software STAR-CCM＋,this study focused on the wind environment of the anti-wind open cut tunnel along the Lanzhou-Xinjiang second railway line and studied the effects of different positions,different wind speeds,up and down lines and different wind angles on the wind-blocking performance of anti-wind open cut tunnels,considering the influence of train-free conditions,adjacent buildings next to the anti-wind tunnels,landform,and so on.The results show that the middle section of the anti-wind tunnel has the best blocking effect,and the Urumqi end of the tunnel has the lowest blocking effect.The blocking effect of the anti-wind tunnel decreases when the wind speed increases,which has more significant impact on the Urumqi end.The blocking effect of the anti-wind tunnel displays a non-linear enhancement trend with the increase of wind angles.

关 键 词：防风明洞 遮蔽效应 风速 上下行线路 风向角 

分 类 号：U25[交通运输工程—道路与铁道工程]