Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study
Rainfall is a crucial issue affecting the entrance slope stability of mountain tunnels, as it decreases the shearing strength of soil and reduces the stability of tunnel entrance. This paper presents a case history of the collapse failure of a tunnel entrance in Yunnan Province under rainfall condit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/16/2486 |
| _version_ | 1797407356166864896 |
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| author | Long-Long Chen Zhi-Feng Wang Ya-Qiong Wang |
| author_facet | Long-Long Chen Zhi-Feng Wang Ya-Qiong Wang |
| author_sort | Long-Long Chen |
| collection | DOAJ |
| description | Rainfall is a crucial issue affecting the entrance slope stability of mountain tunnels, as it decreases the shearing strength of soil and reduces the stability of tunnel entrance. This paper presents a case history of the collapse failure of a tunnel entrance in Yunnan Province under rainfall conditions, in which the failure mechanism and potential factors and treatment measures were discussed by field investigation, theoretical analysis, and in-situ monitoring. The analysis results show that the decrease of soil shear strength was mainly attributed to the decline of matric suction value of soil caused by the increase of soil water content. The decrease of the soil shear strength reduced the sliding resistance of the entrance slope and then triggered the collapse. Based on the results, three treatment measures to prevent a secondary tunnel entrance collapse due to rainfall are adopted, including anti-slide pile, grouting, and slope reinforcement. Combined with the field monitoring data, the effects of treatment measures were investigated. Lessons in this case study facilitate prevention and treatment of tunnel entrance constructions under rainfall conditions. |
| first_indexed | 2024-03-09T03:41:17Z |
| format | Article |
| id | doaj.art-35ccf759d6f041e8ade00968531ccbaa |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T03:41:17Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-35ccf759d6f041e8ade00968531ccbaa2023-12-03T14:40:52ZengMDPI AGWater2073-44412022-08-011416248610.3390/w14162486Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case StudyLong-Long Chen0Zhi-Feng Wang1Ya-Qiong Wang2School of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaRainfall is a crucial issue affecting the entrance slope stability of mountain tunnels, as it decreases the shearing strength of soil and reduces the stability of tunnel entrance. This paper presents a case history of the collapse failure of a tunnel entrance in Yunnan Province under rainfall conditions, in which the failure mechanism and potential factors and treatment measures were discussed by field investigation, theoretical analysis, and in-situ monitoring. The analysis results show that the decrease of soil shear strength was mainly attributed to the decline of matric suction value of soil caused by the increase of soil water content. The decrease of the soil shear strength reduced the sliding resistance of the entrance slope and then triggered the collapse. Based on the results, three treatment measures to prevent a secondary tunnel entrance collapse due to rainfall are adopted, including anti-slide pile, grouting, and slope reinforcement. Combined with the field monitoring data, the effects of treatment measures were investigated. Lessons in this case study facilitate prevention and treatment of tunnel entrance constructions under rainfall conditions.https://www.mdpi.com/2073-4441/14/16/2486tunnel entrancerainfallcollapse failureshearing strengthtreatment |
| spellingShingle | Long-Long Chen Zhi-Feng Wang Ya-Qiong Wang Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study Water tunnel entrance rainfall collapse failure shearing strength treatment |
| title | Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study |
| title_full | Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study |
| title_fullStr | Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study |
| title_full_unstemmed | Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study |
| title_short | Failure Analysis and Treatments of Tunnel Entrance Collapse Due to Sustained Rainfall: A Case Study |
| title_sort | failure analysis and treatments of tunnel entrance collapse due to sustained rainfall a case study |
| topic | tunnel entrance rainfall collapse failure shearing strength treatment |
| url | https://www.mdpi.com/2073-4441/14/16/2486 |
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