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| Study on the segmental structure failure of underwater shield tunnel under high water pressure |
| FENG Kun, HE Chuan, ZHANG Li, GUO Wenqi
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| Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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Abstract At present, the underwater shield tunnels in China are developing towards large-scale cross-sections, consequently, problems such as large buried depth and high waterpressure had brought great challenges to the safety of the segment lining. Accordingly, the load-bearing performance and failure characteristics of segment lining under high water pressure need to be investigated. In view of this, based on the experimental failure results of two prototype large-sectional segment linings used in the Shiziyang Tunnel and the Sutong GIL UHV Power Pipe Gallery Project, the failure characteristics of the large-section segment lining under high-water-pressure were clarified. In addition, the evaluation indexes for the load-bearing performance of the segment lining was proposed and the recommended control parameters based on the test results were given.
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Received: 16 June 2020
Published: 20 September 2020
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