高寒高海拔隧道进出口海拔差下列车内外压力计算方法及应用

杜云超; 陶伟明; 潘朋; 张朋宽; 陈洋宏

doi:10.3973/j.issn.2096-4498.2020.08.012

隧道建设 >

2020 , Vol. 40 >Issue 8: 1192 - 1196

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.08.012

规划与设计

高寒高海拔隧道进出口海拔差下列车内外压力计算方法及应用

杜云超 ,
陶伟明 ,
潘朋 ,
张朋宽 ,
陈洋宏

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（1. 中铁西南科学研究院有限公司，四川成都 611731； 2. 中铁二院工程集团有限责任公司，四川成都 610031；3. 中国铁道科学研究院集团有限公司，北京 100081）

杜云超（1991—），男，陕西汉中人，2016年毕业于兰州交通大学，动力工程专业，硕士，助理工程师，主要从事隧道及地下工程科研及咨询工作。E-mail： yunchao220225@163.com。

网络出版日期: 2020-09-03

基金资助

中国铁路总公司科技研究开发计划（2016G002-A）；中铁科学研究院有限公司科技研究开发计划（2019-KJ006-Z005-A2）；中铁科学研究院有限公司科技研究开发计划（2019-Z003-KJB03-SD）

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Calculation Method and Application of Internal and External Pressure of Train in Tunnel with Elevation Difference at Entrance and Exit in Cold and Highaltitude Area

DU Yunchao ,
TAO Weiming ,
PAN Peng ,
ZHANG Pengkuan ,
CHEN Yanghong

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(1. China Railway Southwest Research Institute Co., Ltd., Chengdu 611731, Sichuan, China; 2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, Sichuan, China; 3. China Academy of Railway Sciences, Beijing 100081, China)

Online published: 2020-09-03

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摘要

为研究西部艰险山区长大隧道进出口存在较大海拔差下的车内外压力计算方法，采用理论分析方法对现有平原地区车内外压力单维计算模型进行修正，使之适用于进出口存在海拔差的隧道。通过青藏铁路列车内压力实测数据的对比，验证计算方法的正确性，并在实际设计中进行应用。主要结论如下： 1）根据大气压力随海拔变化的规律，通过调整原有计算模型中每一时刻对应的基准压力、温度、密度和声速，可实现进出口存在海拔差隧道内列车内外压力的计算； 2）通过此计算方法，确定了某高海拔山岭轨道交通单线隧道断面净空面积为19.5 m2，双线隧道断面净空面积为41.5 m2，列车动态密封指数最低要求为2.5 s。

关键词： 高寒高海拔地区; 铁路隧道; 进出口; 海拔差; 车内外压力; 计算方法

本文引用格式

杜云超 , 陶伟明 , 潘朋 , 张朋宽 , 陈洋宏 . 高寒高海拔隧道进出口海拔差下列车内外压力计算方法及应用[J]. 隧道建设, 2020 , 40(8) : 1192 -1196 . DOI: 10.3973/j.issn.2096-4498.2020.08.012

Abstract

The calculation method of the internal and external pressure of the vehicle passing through the long and large tunnels with the altitude difference between the tunnel entrance and exit in the western mountainous areas in China is of great significance. As a result, the theoretical analysis method is used to modify the singledimensional calculation model of the internal and external pressure of the vehicle in the plain area to make it suitable for the tunnel with a difference in elevation between the entrance and exit. The feasibility of the calculation method is verified by comparing with the measured data in the train of the QinghaiTibet Railway, and the calculation method is applied to actual design. The main conclusions are drawn as follows: (1) According to the variation law of the atmospheric pressure with the altitude, the calculation of the internal and external pressure of a train in an altitude difference tunnel can be realized through adjusting the reference pressure, temperature, density and sound speed corresponding to each time in the original calculation model. (2) The calculation results show that the clearance area of the singletrack tunnel of a highaltitude mountain rail transit is 19.5 m2, that of the doubletrack tunnel is 41.5 m2, and the minimum requirement of the dynamic sealing index of the train is 2.5 s.

Key words： cold and highaltitude areas; railway tunnel; entrance and exit; elevation difference; internal and external pressure of train; calculation method

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