Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel
Isolating cold air within a tunnel is an effective method for mitigating freezing damage. In this study, a flow guide open tunnel structure (FGOT) was developed as a solution to effectively isolate cold airflows without consuming additional energy. The airflow fields in an open cut tunnel (OCT) and...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016825001267 |
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| author | Ke Yin Rui Wang Licai Zhao Lei Wang Songli Chen Yinlei Wang |
| author_facet | Ke Yin Rui Wang Licai Zhao Lei Wang Songli Chen Yinlei Wang |
| author_sort | Ke Yin |
| collection | DOAJ |
| description | Isolating cold air within a tunnel is an effective method for mitigating freezing damage. In this study, a flow guide open tunnel structure (FGOT) was developed as a solution to effectively isolate cold airflows without consuming additional energy. The airflow fields in an open cut tunnel (OCT) and the FGOT were analyzed using a scale model test to verify the FGOT’s ability to block cold air. The anti-freezing performance of the FGOT was also evaluated numerically based on Xinbin Tunnel as a case study. The results indicate that FGOT effectively prevents cold airflows from entering the tunnel. When the angle between the incoming wind direction and the tunnel’s transverse axis does not exceed 45°, an FGOT with a length of 30 m can completely block cold airflows. Regardless of wind direction, the FGOT exhibits a significantly greater capacity to block cold airflows compared to the OCT. In the presence of a portal structure or with only an OCT in place, significant low-temperature zones develop. The FGOT reduces the extent of low-temperature zones in the surrounding rock; this area decreases further as the length of the FGOT increases. These qualities allow the FGOT to significantly enhance the cold resistance of tunnels. |
| format | Article |
| id | doaj-art-293db76c0cae49fda82fdbb10bd1634b |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-293db76c0cae49fda82fdbb10bd1634b2025-02-02T05:26:52ZengElsevierAlexandria Engineering Journal1110-01682025-04-011198598Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnelKe Yin0Rui Wang1Licai Zhao2Lei Wang3Songli Chen4Yinlei Wang5Dept. of Civil Engineering, Chang’an University, Xi’an 710061, ChinaDept. of Civil Engineering, Chang’an University, Xi’an 710061, China; Corresponding author.China Railway 19th Bureau Group Third Engineering Co. Ltd., Shenyang 110136, ChinaDept. of Civil Engineering, Chang’an University, Xi’an 710061, ChinaDept. of Civil Engineering, Chang’an University, Xi’an 710061, ChinaDept. of Civil Engineering, Chang’an University, Xi’an 710061, ChinaIsolating cold air within a tunnel is an effective method for mitigating freezing damage. In this study, a flow guide open tunnel structure (FGOT) was developed as a solution to effectively isolate cold airflows without consuming additional energy. The airflow fields in an open cut tunnel (OCT) and the FGOT were analyzed using a scale model test to verify the FGOT’s ability to block cold air. The anti-freezing performance of the FGOT was also evaluated numerically based on Xinbin Tunnel as a case study. The results indicate that FGOT effectively prevents cold airflows from entering the tunnel. When the angle between the incoming wind direction and the tunnel’s transverse axis does not exceed 45°, an FGOT with a length of 30 m can completely block cold airflows. Regardless of wind direction, the FGOT exhibits a significantly greater capacity to block cold airflows compared to the OCT. In the presence of a portal structure or with only an OCT in place, significant low-temperature zones develop. The FGOT reduces the extent of low-temperature zones in the surrounding rock; this area decreases further as the length of the FGOT increases. These qualities allow the FGOT to significantly enhance the cold resistance of tunnels.http://www.sciencedirect.com/science/article/pii/S1110016825001267Cold regionTunnel cold resistancePortal structureModel testNumerical simulationTemperature field |
| spellingShingle | Ke Yin Rui Wang Licai Zhao Lei Wang Songli Chen Yinlei Wang Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel Alexandria Engineering Journal Cold region Tunnel cold resistance Portal structure Model test Numerical simulation Temperature field |
| title | Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| title_full | Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| title_fullStr | Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| title_full_unstemmed | Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| title_short | Through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| title_sort | through the flow guide portal structure to isolate the cold airflows to improve the cold resistance of the tunnel |
| topic | Cold region Tunnel cold resistance Portal structure Model test Numerical simulation Temperature field |
| url | http://www.sciencedirect.com/science/article/pii/S1110016825001267 |
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