Tunnel Ventilation and Environmental Assurance in Complex Conditions

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Energy, Physics, Environment, and Systems".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 1363

Special Issue Editors


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Guest Editor
School of Civil Engineering, Southwest Jiaotong University, Chengdu 611756, China
Interests: tunnel ventilation; tunnel fire; smoke control; ventilation network theory; thermal damage in high geothermal tunnels; anti-freezing in cold areas

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Co-Guest Editor
School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
Interests: tunnel ventilation; tunnel fire; smoke control; urban public safety; industrial safety; security management

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Co-Guest Editor
School of Civil Engineering, Chongqing University, Chongqing 400044, China
Interests: gas-solid thermal coupling; high geothermal strata; disaster prevention and rescue; tunnel ventilation; mechanism of convective heat transfer; unsteady heat transfer

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Co-Guest Editor
School of Highway, Chang’an University, Xi’an 710064, China
Interests: tunnel engineering; tunnel ventilation; tunnel fire; intelligent tunnel operation; intelligent risk control methods; tunnel disaster prevention

Special Issue Information

Dear Colleagues,

Tunnel disaster and environmental assurance are key constraints on the construction of large tunnels, especially ventilation strategies. Tunnel ventilation is mainly divided into construction ventilation, operational ventilation and fire ventilation. In some complex conditions, such as high ground temperatures or cold tunnels, it is a great challenge to ensure that the tunnel environment is suitable for normal operation. The energy consumption for ventilation of long tunnels is enormous and the designed ventilation capacity is much more than the tunnel needs. As a result, there is a serious waste of electrical resources in tunnel ventilation. As a result, the current tunnelling community has shown an unprecedented demand for more energy-efficient tunnel ventilation and environmental assurance technologies. To promote the development of tunnel ventilation and environmental assurance technologies, this special issue is dedicated to presenting energy-efficient tunnel ventilation, environmental control, disaster prevention and environmental assurance cases of complex and typical tunnelling projects, including, but not limited to, the following wide-ranging topics:

  • Construction ventilation for extra long tunnels
  • Mechanisms of pollutant transport in tunnels
  • Theory of tunnel operation ventilation calculations
  • Operation ventilation for complex tunnels
  • New ventilation design method for complex tunnels
  • Energy saving in tunnel ventilation
  • Environmental assurance for construction and operation of high ground temperature tunnels
  • Anti-freezing technology for tunnels in cold areas
  • Tunnel fire and environmental control
  • Prevention and control cases of thermal (freezing) damage in major tunnel projects

Prof. Dr. Yanhua Zeng
Dr. Xuepeng Jiang
Dr. Xiaohan Zhou
Prof. Dr. Yaqiong Wang
Guest Editors

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Keywords

  • tunnel engineering
  • tunnel fire environment
  • operation ventilation
  • construction environment
  • thermal damage
  • tunnel anti-freeze
  • ventilation energy

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Published Papers (1 paper)

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Research

19 pages, 4534 KiB  
Article
Study on the Influence of High-Altitude Helical Tunnel Curvature on Jet Fan Spatial Layout
by Zijian Wang, Qi Liu, Hao Li, Bin Zhang, Liming Wu, Sichang Wang and Chaolin Jia
Buildings 2024, 14(7), 2160; https://doi.org/10.3390/buildings14072160 - 13 Jul 2024
Viewed by 1053
Abstract
During the operational ventilation process of high-altitude helical tunnels, the installation method of jet fans is a key factor in determining the ventilation efficiency of the tunnel. In this study, the CFD numerical simulation method is adopted to establish three-dimensional ventilation models of [...] Read more.
During the operational ventilation process of high-altitude helical tunnels, the installation method of jet fans is a key factor in determining the ventilation efficiency of the tunnel. In this study, the CFD numerical simulation method is adopted to establish three-dimensional ventilation models of helical tunnels with different curvature radii. Through orthogonal experiments, the effects of tunnel curvature radius on the characteristics of the air jet flow field, under the coupled influences of factors such as lateral spacing of jet fans, vertical height of fans, longitudinal spacing, and lateral offset, are investigated. The results show that when R = 500 m, 600 m, 700 m, and 800 m, the longitudinal spacing has the most significant impact on ventilation efficiency, followed by vertical height, with lateral offset and fan spacing having the least impact. The optimal spacing and vertical height of the fan groups remain consistent under different curvature radii, at 1.25D (fan diameter) and 15 cm, respectively. The optimal longitudinal spacing of the fan groups is 90 m, 90 m, 135 m, and 90 m, respectively. Shifting the fan groups 0.25 to 0.75 m towards the inner side of the tunnel helix (for R < 700 m) can optimize the flow field distribution within the tunnel. Finally, expressions for the relationship between the helical radius and the lateral offset and longitudinal spacing of the fan groups are established for the optimal installation parameters of fan spatial positions under different helical tunnel radii. Full article
(This article belongs to the Special Issue Tunnel Ventilation and Environmental Assurance in Complex Conditions)
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