基于列车活塞效应的多竖井铁路隧道自然通风网络解算分析  

Analysis of Natural Ventilation Network of Multi-shaft Railway Tunnel Based on Effect of Train-induced Piston Wind

作　　者：曾艳华[1] 韩通 李杰[1] 范磊[2] ZENG Yanhua;HAN Tong;LI Jie;FAN Lei(Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《铁道学报》2021年第5期183-189,共7页Journal of the China Railway Society

基　　金：国家重点研发计划(2016YFC0802201);国家自然科学基金(51678502);铁道部科技研究开发计划(2008G028-B)。

摘　　要：为研究多竖井铁路隧道内考虑列车活塞风作用时风流的流动情况,首先以风流在通风网络中流动的三大基本定律为基础,建立了考虑活塞风压力的通风网络数学模型;然后以单竖井铁路隧道的通风网络为例,采用斯考德-亨斯雷迭代算法,对活塞风作用下的通风网络风量修正公式进行了推导,编制了网络解算程序;最后以大瑞铁路高黎贡山隧道为依托,进行了铁路隧道列车行驶在不同位置的通风网络解算,得到了各段隧道及竖井内的风流流动情况。研究结果表明:在多竖井铁路隧道中,受活塞风的作用,隧道中各分段风流的速度大小随着列车行驶而动态变化,竖井中风流速度大小和方向均会随着列车行驶而动态变化;在列车行驶段,网络解算的风流速度与理论公式计算一致,验证了建立的多竖井网络解算模型及计算程序的可靠性;提出的考虑活塞风作用的多竖井铁路隧道通风网络解算方法克服了理论计算式中仅能计算列车运行段活塞风速的缺点,能实现超长大隧道中含多竖井、多横洞、多救援横通道、多泄压通道以及多列列车行驶时,隧道内及辅助通道内风流流动的宏观流动模拟,指导运营通风及排烟通风设计。In order to study the flow of wind of the entire tunnel considering the effect of train-induced piston wind in multi-shaft railway tunnels,a mathematical model of ventilation network considering the piston wind pressure was established based on the three basic laws of airflow in the ventilation network.Then,in the case of the ventilation network of a single vertical shaft railway tunnel,the Scold-Hensley method was used to derive the air volume correction formula for calculating the railway tunnel ventilation network volume considering the action of the piston wind,and a network solution program was developed.Finally,relying on the Gaoligongshan tunnel of the Dali-Ruili railway,the ventilation network of the trains running at different positions in the multi-shaft railway tunnel was solved.The situation of wind flow in each section of the tunnel and in the vertical shafts was obtained..The research results show that:In the multi-shaft railway tunnel,the speed of each segmented airflow in the tunnel changes dynamically with the movement of the train due to the effect of the piston wind.The magnitude and direction of the airflow velocity in the shaft will change dynamically as the train travels.In the tunnel section where the train runs,the wind speed calculated by the network is consistent with the theoretical formula calculation,which verifies the multi-shaft network solution model and the reliability of the calculation program established in this paper.The ventilation network solution of the multi-shaft railway tunnel considering the effect of piston wind proposed in the paper overcomes the disadvantage of the theoretical formula that can only calculate the wind speed in the train operation.The macro flow simulation of wind flow in tunnels and auxiliary tunnels can be realized when multi-shafts,multiple rescue cross-passages,multiple pressure buffer channels,or multi-stage piston wind action are involved in ultra-long tunnels.This will provide guidance for the design of operation ventilation and smoke exhaust pr

关 键 词：铁路隧道 活塞风 竖井 通风网络 风量分配 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]