Mechanism for buckling of shield tunnel linings under hydrostatic pressure |
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| Affiliation: | 1. Research & Development Center, Nippon Koei Co., Ltd., Ibaraki Prefecture 300-1259, Japan;2. School of Civil Engineering, Tianjin University, Tianjin 300072, China;3. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Sichuan 610031, China;4. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;5. Department of Civil and Environmental Engineering, Waseda University, Tokyo 169-8555, Japan;1. ETH Zurich, Switzerland;2. Basler & Hofmann AG, Switzerland;1. Research and Development Center, Nippon Koei Co., Ltd., 2304 Inarihara, Tsukuba 300-1259, Japan;2. Department of Civil and Environmental Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan;1. Faculty of Civil Engineering, University of Tabriz, Iran;2. Faculty of Engineering, Azarbaijan Shahid Madani University, Iran;3. Department of Mining Engineering, Sahand University of Technology, Tabriz, Iran;1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Coast Civil Structure Safety of the Education Ministry, Tianjin University, Tianjin 300072, China;3. Research & Development Center, Nippon Koei Co., Ltd., Ibaraki Prefecture 300-1259, Japan;4. Department of Civil and Environmental Engineering, Waseda University, Tokyo 169-8555, Japan;1. School of Civil Engineering, Central South University, Changsha, Hunan 410075, China;2. China Construction Fifth Engineering Division CROP., Ltd., Changsha 410004, China |
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| Abstract: | In this paper, the effects of segmental joints, dimensions of segments, and ground conditions on buckling of the shield tunnel linings under hydrostatic pressure are studied by analytical and numerical analysis. The results show that radial joints have significant impacts on the buckling behavior: the shield tunnel linings with flexible joints buckles in a single wave mode in the vicinity of K joint, while those with rigid joints buckles in a multi-wave mode around the linings. Hydrostatic buckling strength is found to increase with the flexural rigidity of the radial joint and the thickness of segment increasing. This study shows that ground support increases the buckling strength dramatically, while earth pressure reduces the capacity to resist hydrostatic buckling. The tunnel linings during construction are found to be easier to buckle than that during operation. Meanwhile, the buckling of tunnel linings is studied by theoretical analysis of buried tube buckling. |
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| Keywords: | Shield tunnel Segmental joint Buckling Hydrostatic pressure |
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