摘要
临策铁路设置防沙明洞穿越流动沙丘,避免风沙对铁路的危害。通过野外试验、风洞模拟试验和遥感卫星影像解译的对比分析,研究区域风沙运动、沙丘移动规律,以及防沙明洞建成后与风沙流相互作用的特征,分析认为,在西北风作用下,随着时间的推移,明洞北侧积沙带逐步向防沙明洞靠拢,形成以明洞为基础的线性沙垄,积沙埋至明洞高度时将达到一个相对平衡的状况;但东侧边缘风沙流活动剧烈,需要在东侧洞口外侧一定范围的路基段落采取相应的防护措施。
To avoid the damage from wind-borne sand, the Linhe - Ceke Railway passes through the wandering dune area by means of the specially-built sand-prevention opencut tunnel. This thesis, through comparative analysis among the data of the field experiments, wind tunnel simulation and the remote sensing satellite image interpretation, studied the regional wind-borne sand activity pattern, sand dune movement pattern, and the characteristics of the interaction between sand-prevention opencut tunnel and wind-borne sand flow after the as-buih of the tunnels. The analysis results support the concepts ： the sand ribbon on the north side of the tunnel will gradually gets closer to the tunnel under the action of northwest wind as time goes on, forming a tunnel-based linear sand ridge. And then it will achieve a relative equilibrium state when the sand deposition reaches the height of the tunnel. But the wind-borne sand flow on the edge of the eastern side of the tunnels still acts intensely, thus it is necessary to adopt relevant protective measures for a certain range of the subgrade outside of the eastern tunnel portal.
出处
《铁道标准设计》
北大核心
2013年第11期30-33,109,共5页
Railway Standard Design
基金
中铁工程设计咨询集团有限公司科研项目(2007-5)
关键词
沙漠铁路
新月形沙丘
风沙流
风洞试验
防沙明洞
railway in desert area
crescent dune
wind-borne sand flow
wind tunnel test
sand-prevention opencut tunnel
