Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China
In this study, a field temperature test was performed to reveal the insulation effect of the thermal insulation layer installed at lining surface. The thermal insulation layer is made of polyphenolic, and the thickness is 7 cm. According to the test results, the temperature of the thermal insulation...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4978359 |
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| _version_ | 1832556542354784256 |
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| author | Pengyu Zhao Jianxun Chen Yanbin Luo Lijun Chen Yao Li Chuanwu Wang |
| author_facet | Pengyu Zhao Jianxun Chen Yanbin Luo Lijun Chen Yao Li Chuanwu Wang |
| author_sort | Pengyu Zhao |
| collection | DOAJ |
| description | In this study, a field temperature test was performed to reveal the insulation effect of the thermal insulation layer installed at lining surface. The thermal insulation layer is made of polyphenolic, and the thickness is 7 cm. According to the test results, the temperature of the thermal insulation layer and lining continuously changes with the air temperature in the tunnel in an approximately trigonometric function. The temperature of tunnel lining without thermal insulation layer is close to the air temperature, which results in the lining frost in winter. The maximum temperature difference between the two sides of the thermal insulation layer can be 27°C. In the section whose buried depth is more than 11.4 m, the temperature of lining with thermal insulation layer in winter is mainly influenced by the cold air in the tunnel. When the monthly mean and lowest daily mean air temperature are lower than −10°C and −14.3°C in the coldest month, the temperature at the inner side of the thermal insulation layer is below 0°C. When the buried depth is less than 11.4 m, the temperature of lining is also influenced by the low temperature at ground surface. The temperature of lining is lower. The thicker thermal insulation layer and even active heat measure are needed. Therefore, the design of thermal insulation layer thickness should consider the air temperature distribution and tunnel buried depth along the tunnel length. |
| format | Article |
| id | doaj-art-2cac719cc68344d987748703366908a9 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-2cac719cc68344d987748703366908a92025-02-03T05:45:04ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/49783594978359Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, ChinaPengyu Zhao0Jianxun Chen1Yanbin Luo2Lijun Chen3Yao Li4Chuanwu Wang5School of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaSchool of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaSchool of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaSchool of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaSchool of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaSchool of Highway, Chang’an University, Xi’an, Shaanxi 710064, ChinaIn this study, a field temperature test was performed to reveal the insulation effect of the thermal insulation layer installed at lining surface. The thermal insulation layer is made of polyphenolic, and the thickness is 7 cm. According to the test results, the temperature of the thermal insulation layer and lining continuously changes with the air temperature in the tunnel in an approximately trigonometric function. The temperature of tunnel lining without thermal insulation layer is close to the air temperature, which results in the lining frost in winter. The maximum temperature difference between the two sides of the thermal insulation layer can be 27°C. In the section whose buried depth is more than 11.4 m, the temperature of lining with thermal insulation layer in winter is mainly influenced by the cold air in the tunnel. When the monthly mean and lowest daily mean air temperature are lower than −10°C and −14.3°C in the coldest month, the temperature at the inner side of the thermal insulation layer is below 0°C. When the buried depth is less than 11.4 m, the temperature of lining is also influenced by the low temperature at ground surface. The temperature of lining is lower. The thicker thermal insulation layer and even active heat measure are needed. Therefore, the design of thermal insulation layer thickness should consider the air temperature distribution and tunnel buried depth along the tunnel length.http://dx.doi.org/10.1155/2019/4978359 |
| spellingShingle | Pengyu Zhao Jianxun Chen Yanbin Luo Lijun Chen Yao Li Chuanwu Wang Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China Advances in Civil Engineering |
| title | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China |
| title_full | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China |
| title_fullStr | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China |
| title_full_unstemmed | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China |
| title_short | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China |
| title_sort | investigation of the insulation effect of thermal insulation layer in the seasonally frozen region tunnel a case study in the zuomutai tunnel china |
| url | http://dx.doi.org/10.1155/2019/4978359 |
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