A simple estimation model for 3D braced excavation wall deflection |
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| Affiliation: | 1. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Ministry of Education, Chongqing 400045, China;2. School of Civil Engineering, Chongqing University, Chongqing 400045, China;3. School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore;4. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore;5. IIIBIT-Sydney, Federation University, NSW 2000, Australia;1. Department of Civil Engineering, The University of Akron, Akron, OH 44325, USA;2. The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China;1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China;2. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;3. Department of Geotechnical Engineering, Tongji University, China;4. College of Environmental Science and Engineering, Ocean University of China, China;1. Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA;2. National Central University, Jhongli City, Taoyuan County 32001, Taiwan, ROC;3. Trinity Foundation Engineering Consultants, Co., Ltd., Taipei, Taiwan, ROC;1. Department of Construction Engineering, National Taiwan University of Science and Technology (Taiwan Tech), Taipei, Taiwan;2. Department of Civil Engineering, Zhejiang University, China;1. Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China;2. UMacau Research Institute, Zhuhai, Guangdong, China;1. School of Civil & Environmental Engrg., Nanyang Technological University, Nanyang Avenue, 639798, Singapore;2. National Joint Engineering Research Center of Geohazards Prevention in Reservoir Area Environment, School of Civil Engineering, Chongqing University, Chongqing 400045, China;3. WKS Geotechnical Consultants, 60 Kallang Pudding Road, 349320, Singapore |
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| Abstract: | A series of two-dimensional (2D) and three-dimensional (3D) finite element analyses using the Hardening Soil (HS) model were carried out to investigate the influences of soil properties, wall stiffness, excavation length, excavation depth, clay thickness at the base of the excavation and wall embedment depth, on the maximum wall deflection induced by braced-excavation. The results show that the 3D maximum wall deflections are generally much smaller than those for 2D. Comparisons were also made with other commonly used semi-empirical charts. Based on the finite element results in this study, a simple wall deflection equation was developed for estimating the maximum wall deflection that takes the 3D effects into consideration through different ratios of excavation length over excavation width. |
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| Keywords: | Wall deflection Braced excavation Three-dimensional Two-dimensional Excavation length Finite element analysis |
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