自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第51卷    第5期    总第309期    2020年5月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2020)05-1279-10
差异变形下地铁盾构隧道内行车舒适性研究
施成华1,刘建文1,李翔1,雷明锋1, 2,彭立敏1

(1. 中南大学 土木工程学院,湖南 长沙,410075;
2. 重载铁路工程结构教育部重点实验室,湖南 长沙,410075
)

摘 要: 针对地基沉降、临近施工扰动导致的工后差异变形广泛存在于我国已建地铁盾构区间隧道中,对隧道内的行车安全性和舒适性会产生影响等问题,基于赫兹非线弹性接触理论,考虑车辆、轨道、隧道、围岩的空间结构特征和相互接触关系,建立车-轨-隧-围岩一体化计算模型,计算隆起变形下盾构隧道内运行车辆的轮重减载率及平稳性指标,分析地铁列车行车安全性及舒适性。从线路轨向高差和行车速度这2个主要因素出发,讨论其对行车舒适性的影响规律,探讨不同线路隆起情况下平稳行车的临界速度。研究结果表明:当盾构隧道隆起值在容许范围内且列车以正常运行速度行驶时,能够保证列车的行车安全,但对列车运行舒适性影响较大;行车舒适性与行车速度和隧道隆起程度有关,行车速度的影响程度较明显;当隧道轨向高差达到规范规定的预警值时,平稳行车速度约为80 km/h;当达到控制值时,满足行车舒适性要求的车速仅为20 km/h左右。

 

关键字: 地铁盾构隧道;车-轨-隧-围岩一体化模型;差异变形;行车舒适性

Study on traffic comfort in metro shield tunnel during differential deformation
SHI Chenghua1, LIU Jianwen1, LI Xiang1, LEI Mingfeng1, 2, PENG Limin1

1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. MOE Key Lab of Heavy Haul Railway Engineering Structure, Central South University,
Changsha 410075, China

Abstract:Considering that differential deformation after construction caused by ground settlement and nearby construction disturbance exists widely in metro shield tunnel, which may lead to significant influence on the security and comfort of the operational metro system,based on Hertz non-linear elastic contact theory,the spatial structural characteristics and contact relations of vehicles, tracks, tunnels and surrounding rocks were considered,an integrated calculation model of vehicle-rail-tunnel was established. The wheel load reduction ratio and comfort index of running vehicles with uplift deformation were calculated.The security and comfort of metro trains in shield tunnels during uplift deformation were analyzed.Accounting for the two main factors including the peak value of the rail height difference and the running speed of the train,the mechanism of the two factors on the operational security and comfort was discussed, and the critical speed of steady driving under different line heave conditions was discussed. The results show that when the tunnel heave is within the allowable range and the train running with normal velocity, the operation safety of train can be ensured, while the operation comfort will be greatly affected. The operation comfort of train is related to its running speed and the tunnel heave, and the velocity of train has greater impact on the operation comfort .When the peak value of the rail height difference reaches the warning value specified in the standard, the velocity for steady driving is about 80 km/h. When the allowable limit is reached, the vehicle speed meeting the operation comfort requirements is only about 20 km/h.

 

Key words: metro shield tunnel; train-track-tunnel-soil interaction model; differential deformation; operational comfort

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号