Soil deformation induced by Double-O-Tube shield tunneling with rolling based on stochastic medium theory |
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| Affiliation: | 1. School of Civil Engineering, Chongqing University, Chongqing 400045, China;2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400045, China;1. Politecnico Di Torino – DIATI, Torino, Italy;2. IGAG CNR, Torino, Italy;3. NAP Mineração – Universidade de São Paulo, São Paulo, Brazil;4. Universidad Adolfo Ibanez, Viña Del Mar, Chile;5. Instituto de Goeciências, Universidade de São Paulo, São Paulo, Brazil;1. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;2. College of Environment, Hohai University, Nanjng 210098, China;3. Terracon Consultants, Inc., 2201 Rowland Avenue, Savannah, GA 31404, USA;4. China Railway Fourteenth Group Corporation, Jinan, Shandong 250002, China;1. Key Laboratory for Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing 100044, China;2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore;1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;3. Norwegian Geotechnical Institute, Oslo 0806, Norway;1. Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China;2. Shanghai Jianke Project Management Co., Ltd., 75 Wanping South Road, Shanghai 200032, China |
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| Abstract: | The prediction of soil deformation during tunneling is very difficult for Double-O-Tube (DOT) shield tunnel construction, especially for the shield rolling. According to the characteristics of DOT shield tunneling and rolling, a calculation model of soil deformation due to tunneling-induced ground loss was established. Based on the stochastic medium theory, the theoretical solutions of soil deformations considering the rolling of DOT shield machine were derived by polar coordinate transformation and multi-subdomain integral method. The predicted surface settlement from the proposed solution is better agreement with the observed data than those obtained by the two previous methods (namely the equivalent excavated-area method (EAM) and the simple superstition method (SM)). In addition, only ground surface settlement can be estimated under no rolling of DOT shield machine using the two previous methods, while this proposed solution owns great progress in solving the subsoil deformation and the influences of rolling. In order to further study the influence of DOT shield rolling angle on soil deformation under different engineering conditions, the parameter sensitivity analyses regarding the tunnel depth h, the ground loss parameter ? and the influence zone angle β0 were extensionally discussed. |
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| Keywords: | Double-O-Tube (DOT) shield tunnel Rolling angle Soil deformation Stochastic medium theory |
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