An axisymmetric BNEF method of circular excavations taking into account soil-structure interactions |
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| Affiliation: | 1. Changsha University of Science & Technology, Changsha, Hunan, China;2. Guangdong Provincial Changda Highway Engineering Co., Ltd., Guangzhou, Guangdong, China;3. Hunan Provincial Communications Planning, Survey, & Design Institute, Changsha, Hunan, China;1. Department of Civil Engineering, Shenzhen University, Shenzhen 518060, China;2. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;4. Toyota Motors Corporation (Former NIT Student), Nagoya, Japan;5. Department of Civil Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan;1. Civil Engineering Department, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand;2. Institute of Soil Mechanics, Foundation Engineering and Computational Geotechnics, Graz University of Technology, Graz, Austria;1. State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, China;2. Shanghai Urban Construction Design and Research Institute, 3447 Dongfang Road, Shanghai, China;3. Shanghai Foundation Engineering Co. Ltd., 406 Jiangxi Middle Rd., Shanghai 200002, China |
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| Abstract: | An axisymmetric BNEF method was proposed to analyze circular excavations. The governing equations of embedded cylindrical diaphragm walls were derived from thin-shell theory. A hyperbolic model was proposed to account for soil-structure interactions. Then, a FEM program was coded and verified using a case study. Overall, the method caught the main trend in the measured results and provided a reasonable estimation for engineering practice. Furthermore, the development of earth pressure and the hoop stress in the walls (ring beams) can be obtained using conventional parameters, extending the ability of the classic BEF method to aid the design of circular excavations. |
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| Keywords: | Circular excavation Cylinder diaphragm wall Ring beam BNEF method Soil-structure interaction |
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