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Earthquakes and Structures Volume 17, Number 4, October 2019 , pages 411-424 DOI: https://doi.org/10.12989/eas.2019.17.4.411 |
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Dynamic response and waterproof property of tunnel segmental lining subjected to earthquake action |
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Qixiang Yan, Rui Bao, Hang Chen, Binjia Li, Wenyu Chen, Yongwen Dai and Hongyuan Zhou
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| Abstract | ||
| In this study, a numerical model of a shield tunnel with an assembled segmental lining was built. The seismic response of the segmental lining of the section of the shield tunnel in Line 1 of the Chengdu Metro is analyzed as it passes through the interface of sand-cobble and mudstone layers. To do so, the node-stress seismic-motion input method was used to input the seismic motion measured during the 2008 Wenchuan earthquake, and the joint openings and dislocations associated with the earthquake action were obtained. With reference to the Ethylene-Propylene-Diene Monomer (EPDM) sealing gaskets used in the shield tunnels in the Chengdu Metro, numerical simulation was applied to analyze the contact pressure along the seepage paths and the waterproof property under different joint openings and dislocations. A laboratory test on the elastic sealing gasket was also conducted to study its waterproof property. The test results accord well with the numerical results and the occurrence of water seepage in the section of the shield tunnel in Line 1 of the Chengdu Metro during the 2008 Wenchuan earthquake was verified. These research results demonstrate the deformation of segmental joint under earthquake, also demonstrate the relationship between segmental joint deformation and waterproof property. | ||
| Key Words | ||
| segmental lining; node-stress seismic-motion input method; joint deformation; elastic sealing gasket; waterproof property | ||
| Address | ||
| Qixiang Yan: Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, China Rui Bao: Beijing Urban Construction Design & Development Group Co., Ltd., Beijing 100037, China Hang Chen: Sichuan Highway Planning, Survey, Design and Research Institute Co., Ltd., Chengdu 610041, China Binjia Li: Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, China Wenyu Chen: Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, China Yongwen Dai: China Water Conservancy and Hydropower Seventh Engineering Bureau Co., Ltd., Chengdu 610213, China Hongyuan Zhou: China Water Conservancy and Hydropower Seventh Engineering Bureau Co., Ltd., Chengdu 610213, China | ||