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Numerical analysis of lateral movements and strut forces in deep cement mixing walls with top-down construction in soft clay
Institution:1. Soil Engineering Research Center, Department of Civil Engineering, King Mongkut’s University of Technology North Bangkok, Thailand;2. Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand;3. School of Civil Engineering and Center of Excellence in Innovation for Sustainable Infrastructure Development, Suranaree University of Technology, Thailand;1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China;2. Norwegian Geotechnical Institute, N-0806 Oslo, Norway;3. CREEC East China Survey and Design Co., Ltd., Floor 24, Haili Building, 88 Dapu Road, Shanghai 200023, PR China;1. Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, Taipei 10672, Taiwan;2. Department of Assets and Property Management, Hwa Hsia Institute of Technology, New Taipei City 23568, Taiwan;1. Graduate School of Science and Technology, Saga University, Saga, Japan;2. Institute of Lowland and Marine Research, Saga University, Saga, Japan;3. JIP Techno Science Corporation, Tokyo, Japan;1. Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand;2. Geotechnical Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand;2. Skanska Sweden AB, Stockholm, Sweden;1. Department of Civil Engineering, National Kaohsiung University of Applied Sciences, 415, Chen Kung Road, Kaohsiung 807, Taiwan;2. Department of Civil and Construction Engineering, National Taiwan University of Science and Technology (Taiwan Tech), 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan;3. Department of Civil Engineering, National Cheng Kung University, 1, University Rd., Tainan 701, Taiwan
Abstract:This article presents the observed and simulated lateral movements and strut forces induced in deep cement mixing walls under deep excavation using top-down construction techniques in soft Bangkok clay. The walls are supported laterally by permanent concrete slabs and temporary struts. A three-dimensional numerical model is first calibrated with observed data from a case study. Then, a parametric study is performed to compare this construction method with the bottom-up method and investigate the influence of the DCM wall thickness on lateral movements and strut forces of the wall.
Keywords:Deep excavation  Deep mixing  Finite element  Simulation  Top-down construction in three dimensions  Wall
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