铁路站场风吹雪分布特征研究  

Study on snow-drifting distribution characteristics of railway yard

作　　者：彭晓川 Peng Xiaochuan(Xinjiang Railway Survey and Design Institute,Urumqi Xinjiang 830011,China)

机构地区：[1]新疆铁道勘察设计院有限公司,新疆乌鲁木齐830011

出　　处：《山西建筑》2024年第14期140-144,共5页Shanxi Architecture

基　　金：中国铁路乌鲁木齐局集团有限公司科技研究开发计划项目(编号:2023-kj-89)。

摘　　要：风吹雪现象会影响铁路运输安全,积雪严重时阻断铁路交通。因此该论文基于建立的铁路站场和车辆的多相流仿真计算模型,对有无列车停站和不同股道数对风雪场分布特征的影响进行了分析。研究表明,站内无停车时,迎风侧路基区域的流速较低,而站内顺风向的流速逐渐增加,风速和积雪分布的变化趋势相对平缓;而在站内有停车时,列车上风侧存在一个长约8 m、高为2 m的流场减速区,下风侧存在一个长约5 m、高为0.5 m的流场加速区。列车上风侧近处和下风侧远处的雪量增加,上风侧远处和下风侧近处的雪量减少。同时,站场内的股道数也会影响风雪场分布,增加股道数时,站场内的雪量最小值和平均雪量减小,但雪量最大值较为接近且位置都在列车上风侧;站场内的流场变化是雪量分布差异的根本原因,股道数的增加减缓了站场结构对风吹雪的影响作用。Snow-drifting can affect railway transportation safety,with the potential to block railway traffic when snow accumulates significantly.Therefore,based on the established multiphase flow simulation model of railway yard and train,the impact of train stopping and the number of tracks on the distribution characteristics of snow-drifting were analyzed in this study.It is found that in the absence of train stops within the yard,the windward side of the embankment area had lower flow velocity,while the flow velocity gradually increased along the downwind direction within the yard,the changes in wind speed and snow distribution were relatively gradual;However,when trains were present within the yard,a flow deceleration zone with a length of approximately 8 m and a height of 2 m on the windward side,while a flow acceleration zone with a length of approximately 5 m and a height of 0.5 m on the leeward side.The snow accumulation increased in the vicinity of the windward side and the far side of the leeward side,and decreased in the far side of the windward side and the vicinity of the leeward side.Furthermore,the number of tracks within the yard also impacted the distribution of snow-drifting.With an increase in the number of tracks,the minimum and average snow accumulation within the yard decreased,while the maximum snow accumulation became more uniform and situated on the windward side of the trains;The variation in flow field within the yard was identified as the fundamental reason for the differences in snow accumulation distribution,and the increase in the number of tracks mitigated the impact of blowing snow within the yard.

关 键 词：铁路站场 风吹雪 多相流 流场分布特征 运动平衡 

分 类 号：TU997[建筑科学—市政工程] U492.1[交通运输工程—交通运输规划与管理]