Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau
The temperature field of the subway stratum is a consequential basis for adjusting the thermal environment in the subway. In this paper, the initial ground temperature of Lanzhou subway in the Loess Plateau was measured, and the temperature field evolution of the surrounding rock in the subway tunne...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-03-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23001090 |
| _version_ | 1811166412424609792 |
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| author | Jianghong Zhu Huyuan Zhang Guoliang Ma Yu Tan Ying Wang |
| author_facet | Jianghong Zhu Huyuan Zhang Guoliang Ma Yu Tan Ying Wang |
| author_sort | Jianghong Zhu |
| collection | DOAJ |
| description | The temperature field of the subway stratum is a consequential basis for adjusting the thermal environment in the subway. In this paper, the initial ground temperature of Lanzhou subway in the Loess Plateau was measured, and the temperature field evolution of the surrounding rock in the subway tunnel was explored under operational conditions. The results show that in the initial ground temperature field, the annual variable temperature layer of the subway is located at the surface to the depth of 12 m, with a sinusoidal distribution and a phase lag phenomenon. The lag time of the initial ground temperature at 11 m depth is about 80 days compared with the initial ground temperature at 1 m depth. The annual constant temperature layer is located below the depth of 12 m with a temperature of 15.2 °C. Moreover, the air temperature has the greatest influence on the heat exchange between the air and surrounding rock. The heat flux is negatively correlated with the heat exchange time, while positively correlated with the low water content and air temperature. However, the tunnel shape and high water content have little effect on the variation in heat flux, which is less than 0.1 W/m2. |
| first_indexed | 2024-04-10T15:51:54Z |
| format | Article |
| id | doaj.art-8efc56a52d7e4827a879105035ce9bab |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-10T15:51:54Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-8efc56a52d7e4827a879105035ce9bab2023-02-11T04:15:39ZengElsevierCase Studies in Thermal Engineering2214-157X2023-03-0143102803Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess PlateauJianghong Zhu0Huyuan Zhang1Guoliang Ma2Yu Tan3Ying Wang4College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, China; Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), Ministry of Education, Lanzhou, 730000, China; Corresponding author. Rd 222 South Tianshui, Lanzhou, Gansu, 730000, China.College of Civil Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, ChinaThe temperature field of the subway stratum is a consequential basis for adjusting the thermal environment in the subway. In this paper, the initial ground temperature of Lanzhou subway in the Loess Plateau was measured, and the temperature field evolution of the surrounding rock in the subway tunnel was explored under operational conditions. The results show that in the initial ground temperature field, the annual variable temperature layer of the subway is located at the surface to the depth of 12 m, with a sinusoidal distribution and a phase lag phenomenon. The lag time of the initial ground temperature at 11 m depth is about 80 days compared with the initial ground temperature at 1 m depth. The annual constant temperature layer is located below the depth of 12 m with a temperature of 15.2 °C. Moreover, the air temperature has the greatest influence on the heat exchange between the air and surrounding rock. The heat flux is negatively correlated with the heat exchange time, while positively correlated with the low water content and air temperature. However, the tunnel shape and high water content have little effect on the variation in heat flux, which is less than 0.1 W/m2.http://www.sciencedirect.com/science/article/pii/S2214157X23001090Lanzhou subwayThermal environmentGround temperatureHeat exchangeChinese loess plateau |
| spellingShingle | Jianghong Zhu Huyuan Zhang Guoliang Ma Yu Tan Ying Wang Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau Case Studies in Thermal Engineering Lanzhou subway Thermal environment Ground temperature Heat exchange Chinese loess plateau |
| title | Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau |
| title_full | Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau |
| title_fullStr | Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau |
| title_full_unstemmed | Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau |
| title_short | Ground temperature distribution and evolution of Lanzhou subway in the Chinese Loess Plateau |
| title_sort | ground temperature distribution and evolution of lanzhou subway in the chinese loess plateau |
| topic | Lanzhou subway Thermal environment Ground temperature Heat exchange Chinese loess plateau |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23001090 |
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