Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels
With the development of transportation engineering, mining engineering, underground space engineering, and long-distance water diversion projects in China, the occurrence of tunnel water inrush disasters has become increasingly frequent. Due to the limited analytical study on the flow field of circu...
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Editorial Office of Hydrogeology & Engineering Geology
2024-11-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202312024 |
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| author | Yunbo WEI Jinguo WANG Zhou CHEN Kexun ZHENG |
| author_facet | Yunbo WEI Jinguo WANG Zhou CHEN Kexun ZHENG |
| author_sort | Yunbo WEI |
| collection | DOAJ |
| description | With the development of transportation engineering, mining engineering, underground space engineering, and long-distance water diversion projects in China, the occurrence of tunnel water inrush disasters has become increasingly frequent. Due to the limited analytical study on the flow field of circular arched tunnels, an analytical solution for the water inrush and the flow field in the surrounding rock around a deep-buried circular arched tunnel was obtained using the conformal transformation method. Then the distribution of water inrush around the tunnel circumference was explored. The results reveal that the groundwater flow field near the tunnel is significantly influenced by the tunnel shape, while its influence on the groundwater flow field further away from the tunnel can be approximated as that of a tunnel with a circular cross-section. The maximum flow velocity around the circular arched tunnel occurs near the inflection points (i.e., the corners of the tunnel bottom), while the minimum flow velocity is located at the center of the tunnel floor. The flow velocity at the corners of the tunnel bottom can exceed three times the flow velocity at the center of the tunnel floor. As the tunnel shape approaches a circle, the relative differences of flow velocities at various points around the tunnel circumference gradually decrease. This study can provide a theoretical basis for estimating the water inrush flux and characterizing the groundwater flow field in the surrounding rock around circular arched tunnels, and support for tunnel construction planning and the design for tunnel groundwater seepage/drainage. |
| format | Article |
| id | doaj-art-a9239e6701fa43a7b679ea1e35e02c33 |
| institution | Kabale University |
| issn | 1000-3665 |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj-art-a9239e6701fa43a7b679ea1e35e02c332025-01-18T03:53:12ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652024-11-01516182410.16030/j.cnki.issn.1000-3665.202312024202312024Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnelsYunbo WEI0Jinguo WANG1Zhou CHEN2Kexun ZHENG3School of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 210046, ChinaSchool of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 210046, ChinaSchool of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 210046, ChinaPower China Guiyang Engineering Corporation Limited, Guiyang, Guizhou 550081, ChinaWith the development of transportation engineering, mining engineering, underground space engineering, and long-distance water diversion projects in China, the occurrence of tunnel water inrush disasters has become increasingly frequent. Due to the limited analytical study on the flow field of circular arched tunnels, an analytical solution for the water inrush and the flow field in the surrounding rock around a deep-buried circular arched tunnel was obtained using the conformal transformation method. Then the distribution of water inrush around the tunnel circumference was explored. The results reveal that the groundwater flow field near the tunnel is significantly influenced by the tunnel shape, while its influence on the groundwater flow field further away from the tunnel can be approximated as that of a tunnel with a circular cross-section. The maximum flow velocity around the circular arched tunnel occurs near the inflection points (i.e., the corners of the tunnel bottom), while the minimum flow velocity is located at the center of the tunnel floor. The flow velocity at the corners of the tunnel bottom can exceed three times the flow velocity at the center of the tunnel floor. As the tunnel shape approaches a circle, the relative differences of flow velocities at various points around the tunnel circumference gradually decrease. This study can provide a theoretical basis for estimating the water inrush flux and characterizing the groundwater flow field in the surrounding rock around circular arched tunnels, and support for tunnel construction planning and the design for tunnel groundwater seepage/drainage.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202312024conformal mappingtunnelgroundwatergroundwater inrushseepage flowanalytic method |
| spellingShingle | Yunbo WEI Jinguo WANG Zhou CHEN Kexun ZHENG Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels Shuiwen dizhi gongcheng dizhi conformal mapping tunnel groundwater groundwater inrush seepage flow analytic method |
| title | Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels |
| title_full | Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels |
| title_fullStr | Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels |
| title_full_unstemmed | Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels |
| title_short | Analytical study of groundwater flow field and inrush flux distribution for deeply-buried circular arched tunnels |
| title_sort | analytical study of groundwater flow field and inrush flux distribution for deeply buried circular arched tunnels |
| topic | conformal mapping tunnel groundwater groundwater inrush seepage flow analytic method |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202312024 |
| work_keys_str_mv | AT yunbowei analyticalstudyofgroundwaterflowfieldandinrushfluxdistributionfordeeplyburiedcirculararchedtunnels AT jinguowang analyticalstudyofgroundwaterflowfieldandinrushfluxdistributionfordeeplyburiedcirculararchedtunnels AT zhouchen analyticalstudyofgroundwaterflowfieldandinrushfluxdistributionfordeeplyburiedcirculararchedtunnels AT kexunzheng analyticalstudyofgroundwaterflowfieldandinrushfluxdistributionfordeeplyburiedcirculararchedtunnels |