Study on the influence of airflow on the temperature of the surrounding rock in a cold region tunnel and its application to insulation layer design

Tan, Xianjun; Chen, Weizhong; Yang, Diansen; Dai, Yonghao; Wu, Guisheng; Yang, Jianping; Yu, Hongdan; Tian, Hongming; Zhao, Wang

doi:10.1016/j.applthermaleng.2014.03.016

Cited by 124 publications

(38 citation statements)

References 24 publications

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“…Experimental study and numerical analysis. Because the multi-dimensional and dynamic calculations of the longitudinal ventilation of road tunnels are complex, experimental study and simulation analysis are performed (Colella et al, 2009;Li and Chow, 2003;Tan et al, 2013Tan et al, , 2014. The research began in European countries in the beginning of the 1970s.…”

Section: Research Statusmentioning

confidence: 99%

Experimental research on the mixture mechanism of polluted and fresh air at the portal of small-space road tunnels

Tan

Chen

Dai

et al. 2015

Tunnelling and Underground Space Technology

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Section: Research Statusmentioning

confidence: 99%

Experimental research on the mixture mechanism of polluted and fresh air at the portal of small-space road tunnels

Tan

Chen

Dai

et al. 2015

Tunnelling and Underground Space Technology

Self Cite

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“…At present, applying heat-insulating layers to tunnel lining surfaces is one of the main methods to prevent damages from frost in tunnels in China, e.g., the Zhegu mountain tunnel, the Daban mountain tunnel, and the Kunlun mountain tunnel. Past studies [1,2] have shown that damages from frost in tunnels are usually observed near tunnel ends, while rarely being found in the middle of tunnels. Using heat-insulating layers can effectively reduce the influence of cold air on the temperature of surrounding rocks and tunnel linings [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…One domain is a fluid domain formed by the airflow in the tunnel, while the other one is a solid domain formed by the tunnel lining (heat-insulating layer) and the surrounding rock. In the fluid domain, the governing differential equations used to analyze the motion fields and the temperature fields should consist of the energy conservation Equation (1), the mass conservation Equation (2), and the turbulence Equation (3). In the solid domain, the governing differential equation used to analyze the temperature fields is the energy conservation equation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Heat-Insulating Layers in a Cold Region Tunnel, Taking into Account Airflow and Heat Transfer

Yan

Zhang

et al. 2017

Applied Sciences

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In cold regions, heat-insulating layers play a crucial role in frost prevention in tunnels. This paper presents a numerical study on the anti-freezing behavior of a cold region tunnel (the Dege tunnel) with heat-insulating layers. A numerical model based on the temperature field coupling theory is firstly proposed and validated using field test data of the Dege tunnel. Subsequently, a comprehensive parametric study is carried out to investigate the influences of heat-insulating layers on the temperature characteristics of airflows inside the tunnel, the surrounding rock, and the tunnel lining. Furthermore, a numerical investigation based on the proposed numerical model is carried out to propose reasonable design parameters of heat-insulating layers for different velocities of mechanical ventilation, and different heat-insulating materials for cold region tunnels. The numerical results show that using the heat-insulating layer can effectively reduce the heat transfer between the surrounding rock and the airflow inside the tunnel. It is also found that the design parameters for the heat-insulating layer are greatly affected by the tunnel ventilation conditions and heat-insulating materials.

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“…The results of temperature monitored in Qinghai Tibet Plateau show that the annual average temperature difference in depth of 0.5m~6.5m is no more than 0.1 ℃, and the annual temperature fluctuation range in depth of 6.5m is less than 1℃. Thus, the initial temperature is taken the annual average temperature of the section 50m from the entrance, which is expressed as formula (4). At the lining surface and ground surface, the monitored or fitted data at the 50m section is taken as boundary conditions.…”

Section: Table 1 Calculating Parametersmentioning

confidence: 99%

“…During the last quarter century a large number of cold region tunnels have been built in China, such as Fenghuoshan tunnel, Kunlunshan tunnel, Dabanshan tunnel, et al which are threatened with serious frozen damage at its construction and operation period [3][4]. Chinese researchers have conducted the site test of tunnel temperature from 1980s.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Continuous in-Situ Monitoring of Tunnel Lining Surface Temperature in Cold Region and Its Application

Li¹,

Wu²,

Fu³

et al. 2015

IJHT

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In-situ monitoring of tunnel lining surface temperature is the basis for deciding the measures, distribution and parameters of freezing-proof. To overcome the deficiencies in timing frequency of the previous monitoring, an automatic recorder is invented to adapt to low temperature environment and record the lining surface temperature of Hongfu tunnel every hour for nearly two years. With the measured data, main results are obtained as follow: annual temperature changes nearly in a sine form; influenced by the air flow inside the tunnel, temperature changes in a similar way at every monitored section inside. Before tunnel breakthrough, the further the section is from the two ends of the tunnel, the higher the average temperature is in the coldest month. And the average temperature of the coldest month is above 0℃ when the distance is over 200m. After tunnel breakthrough, the temperature is below 0℃ inside the tunnel. The measured data is taken as the boundary condition to simulate the temperature of tunnel lining and surrounding rock with finite element method. The simulation results show that: tunnel lining may freeze and thaw many times in a year; the temperature of tunnel lining and surrounding rock close to lining is below 0℃ in the coldest month, and heat transfers into lining from surrounding rock and its maximum heat flux is 36.08w/m 2 on the lining surface. Taking the fitted data by sine function as boundary condition will make some error in tunnel lining temperature.

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Study on the influence of airflow on the temperature of the surrounding rock in a cold region tunnel and its application to insulation layer design

Cited by 124 publications

References 24 publications

Experimental research on the mixture mechanism of polluted and fresh air at the portal of small-space road tunnels

Experimental research on the mixture mechanism of polluted and fresh air at the portal of small-space road tunnels

Numerical Investigation of Heat-Insulating Layers in a Cold Region Tunnel, Taking into Account Airflow and Heat Transfer

Long-Term Continuous in-Situ Monitoring of Tunnel Lining Surface Temperature in Cold Region and Its Application

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