Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China
Karst landscape is a general term for earth surfaces and underground patterns that have been formed by the dissolution of soluble rock. Karst landscapes are widely distributed throughout China—particularly in the Guangxi and Guangdong provinces. The main features of karst landscapes are typically re...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/9013815 |
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| author | Junjie Li Qiunan Chen Xiaocheng Huang Gen Zou Jiazheng Deng |
| author_facet | Junjie Li Qiunan Chen Xiaocheng Huang Gen Zou Jiazheng Deng |
| author_sort | Junjie Li |
| collection | DOAJ |
| description | Karst landscape is a general term for earth surfaces and underground patterns that have been formed by the dissolution of soluble rock. Karst landscapes are widely distributed throughout China—particularly in the Guangxi and Guangdong provinces. The main features of karst landscapes are typically reflected in karst caverns, sinkholes, and other geographical phenomena. During tunnel construction in karst areas, various forms of karst caverns may appear on the construction route, and they can cause hazards—such as water inrush and collapse—during tunnel construction. These hazards affect the tunnel construction process. As such, it is necessary to propose a treatment for karst caverns. In this work, a case study of the tunnels on the Hechi-Baise expressway is presented. A comprehensive pretreatment method suitable for this tunnel is proposed. On the premise of prioritizing the safety and timeline of construction, an optimized treatment scheme for the karst caverns of Hebai tunnel is followed. The optimized treatment scheme primarily includes calculation of safe thickness of tunnel face, strengthening the initial support and increasing the thickness of the second lining, increasing the reserved deformation, and grouting. The proposed scheme achieved favorable results in the treatment of a karst cavern in the Hebai tunnels. |
| format | Article |
| id | doaj-art-08b3d684583f4dd9bd7376a6599a025c |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-08b3d684583f4dd9bd7376a6599a025c2025-02-03T01:24:47ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/90138159013815Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, ChinaJunjie Li0Qiunan Chen1Xiaocheng Huang2Gen Zou3Jiazheng Deng4Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Hunan, Xiangtan 411201, ChinaSchool of Civil Engineering, Hunan University of Science and Technology, Hunan, Xiangtan 411201, ChinaNational Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, Hunan, ChinaSchool of Civil Engineering, Hunan University of Science and Technology, Hunan, Xiangtan 411201, ChinaSchool of Civil Engineering, Hunan University of Science and Technology, Hunan, Xiangtan 411201, ChinaKarst landscape is a general term for earth surfaces and underground patterns that have been formed by the dissolution of soluble rock. Karst landscapes are widely distributed throughout China—particularly in the Guangxi and Guangdong provinces. The main features of karst landscapes are typically reflected in karst caverns, sinkholes, and other geographical phenomena. During tunnel construction in karst areas, various forms of karst caverns may appear on the construction route, and they can cause hazards—such as water inrush and collapse—during tunnel construction. These hazards affect the tunnel construction process. As such, it is necessary to propose a treatment for karst caverns. In this work, a case study of the tunnels on the Hechi-Baise expressway is presented. A comprehensive pretreatment method suitable for this tunnel is proposed. On the premise of prioritizing the safety and timeline of construction, an optimized treatment scheme for the karst caverns of Hebai tunnel is followed. The optimized treatment scheme primarily includes calculation of safe thickness of tunnel face, strengthening the initial support and increasing the thickness of the second lining, increasing the reserved deformation, and grouting. The proposed scheme achieved favorable results in the treatment of a karst cavern in the Hebai tunnels.http://dx.doi.org/10.1155/2021/9013815 |
| spellingShingle | Junjie Li Qiunan Chen Xiaocheng Huang Gen Zou Jiazheng Deng Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China Advances in Civil Engineering |
| title | Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China |
| title_full | Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China |
| title_fullStr | Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China |
| title_full_unstemmed | Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China |
| title_short | Pretreatment for Tunnel Karst Cave during Excavation: A Case Study of Guangxi, China |
| title_sort | pretreatment for tunnel karst cave during excavation a case study of guangxi china |
| url | http://dx.doi.org/10.1155/2021/9013815 |
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