Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass
With the long-term running of the subway, the soil layer around the tunnel takes on the thermal deposition effect, which can lead the air in the tunnel to heat up and pose a serious threat to the safety operation of trains. Through taking some subway tunnels from typical zones as an example, the inf...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/17/9534 |
| _version_ | 1797582852987027456 |
|---|---|
| author | Huaitao Song Jingfen Li Yueyang Yu Qianlong Chen |
| author_facet | Huaitao Song Jingfen Li Yueyang Yu Qianlong Chen |
| author_sort | Huaitao Song |
| collection | DOAJ |
| description | With the long-term running of the subway, the soil layer around the tunnel takes on the thermal deposition effect, which can lead the air in the tunnel to heat up and pose a serious threat to the safety operation of trains. Through taking some subway tunnels from typical zones as an example, the influence of tunnel depth on the heat storage characteristics of the surrounding soil mass was analyzed in the paper. The results indicate that the temperature field of the surrounding soil mass was thermally disturbed by both the ground air temperature and the tunnel air temperature, and there was a significant coupling point ‘O’ located at the center of the tunnel overburden. With the extension of the heat-exchange time, the shape of the cooling ring around the tunnel gradually changed from a circle to an oval. For the analysis of cases, from the space aspect, when the tunnel depth was less than 30 m, the wall temperature increased gradually with the increase of tunnel depth. From the time aspect, over time, the wall temperature gradually rose and finally reached a fixed value. From the region aspect, the heat absorption capacity of different areas decreased gradually with the increase of tunnel depth. When the depth exceeded 45 m, the heat absorption capacity of certain cities became negative. In addition, three typical boundaries were discussed, and the optimal method for evaluating the heat absorption capacity of the tunnel soil was ultimately determined. This study has important reference value for temperature control and positioning problems in the process of tunnel construction and operation. |
| first_indexed | 2024-03-10T23:28:27Z |
| format | Article |
| id | doaj.art-3025cd65eaec454f96cf1cded878deb2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T23:28:27Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3025cd65eaec454f96cf1cded878deb22023-11-19T07:48:21ZengMDPI AGApplied Sciences2076-34172023-08-011317953410.3390/app13179534Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil MassHuaitao Song0Jingfen Li1Yueyang Yu2Qianlong Chen3School of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, ChinaSchool of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, ChinaSchool of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, ChinaSchool of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, ChinaWith the long-term running of the subway, the soil layer around the tunnel takes on the thermal deposition effect, which can lead the air in the tunnel to heat up and pose a serious threat to the safety operation of trains. Through taking some subway tunnels from typical zones as an example, the influence of tunnel depth on the heat storage characteristics of the surrounding soil mass was analyzed in the paper. The results indicate that the temperature field of the surrounding soil mass was thermally disturbed by both the ground air temperature and the tunnel air temperature, and there was a significant coupling point ‘O’ located at the center of the tunnel overburden. With the extension of the heat-exchange time, the shape of the cooling ring around the tunnel gradually changed from a circle to an oval. For the analysis of cases, from the space aspect, when the tunnel depth was less than 30 m, the wall temperature increased gradually with the increase of tunnel depth. From the time aspect, over time, the wall temperature gradually rose and finally reached a fixed value. From the region aspect, the heat absorption capacity of different areas decreased gradually with the increase of tunnel depth. When the depth exceeded 45 m, the heat absorption capacity of certain cities became negative. In addition, three typical boundaries were discussed, and the optimal method for evaluating the heat absorption capacity of the tunnel soil was ultimately determined. This study has important reference value for temperature control and positioning problems in the process of tunnel construction and operation.https://www.mdpi.com/2076-3417/13/17/9534subway tunnelsoil masstunnel depththermal deposition effectfinite volume method |
| spellingShingle | Huaitao Song Jingfen Li Yueyang Yu Qianlong Chen Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass Applied Sciences subway tunnel soil mass tunnel depth thermal deposition effect finite volume method |
| title | Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass |
| title_full | Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass |
| title_fullStr | Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass |
| title_full_unstemmed | Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass |
| title_short | Research on the Influence of Subway Tunnel Depth on Heat Storage Characteristics of the Surrounding Soil Mass |
| title_sort | research on the influence of subway tunnel depth on heat storage characteristics of the surrounding soil mass |
| topic | subway tunnel soil mass tunnel depth thermal deposition effect finite volume method |
| url | https://www.mdpi.com/2076-3417/13/17/9534 |
| work_keys_str_mv | AT huaitaosong researchontheinfluenceofsubwaytunneldepthonheatstoragecharacteristicsofthesurroundingsoilmass AT jingfenli researchontheinfluenceofsubwaytunneldepthonheatstoragecharacteristicsofthesurroundingsoilmass AT yueyangyu researchontheinfluenceofsubwaytunneldepthonheatstoragecharacteristicsofthesurroundingsoilmass AT qianlongchen researchontheinfluenceofsubwaytunneldepthonheatstoragecharacteristicsofthesurroundingsoilmass |