Seismic response of a pile-supported excavation on Santiago gravel |
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| Institution: | 1. Institute of Soil Mechanics and Rock Mechanics (IBF), Karlsruhe Institute of Technology (KIT), Germany;2. Formerly IBF (KIT), since 8/2017 IBO PartG mbB, Germany;1. School of Sciences, Southwest Petroleum University, Chengdu, Sichuan 610500, People’s Republic of China;2. College of Mathematics and Software Science, Sichuan Normal University, Chengdu, Sichuan 610066, People’s Republic of China;1. Research Institute of Marine Systems Engineering, Department of Naval Architecture and Ocean Engineering, Collage of Engineering, Seoul National University, Seoul, Republic of Korea;2. Offshore Oil/Gas Research Center, China University of Petroleum – Beijing, Beijing, China;3. Drilling Department, China Oilfield Services Limited, Yanjiao, Hebei, China;1. School of Civil, Environmental and Infrastructure Engineering, Southern Illinois University, Carbondale, IL, 62901, USA;2. Geosyntec Consultants Inc., Chesterfield, MO, 63005, USA;3. Dept. of Civil Engineering, Southern Illinois University, Edwardsville, IL, 62026, USA;1. School of Civil Engineering and Architecture, Zhejiang University of Science & Technology, Hangzhou, 310023, China;2. College of Engineering, Zhejiang University City College, Hangzhou 310015, China;3. The Architectural Design & Research Institute of Zhejiang University Corporation Limited, Hangzhou, 310028, China;4. Center for Balance Architecture, Zhejiang University, Hangzhou, 310028, China;5. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China;6. Department of Civil Engineering, Shanghai University, Shanghai, 200444, China |
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| Abstract: | Non-secant anchored piling support is one of the most frequent earth-retaining systems for temporary deep excavations in Santiago, Chile. The main advantages of using non-secant piling support are their relatively low cost and ease of installation. This system is particularly efficient on stiff soils with deep groundwater table, conditions usually found in Santiago. This paper presents the results of a numerical investigation aimed to study the characteristics of earthquake-induced lateral pressures on a recent pile-supported excavation 26 m deep. The estimated static deformations of the piles were compared against some measurements performed during the excavation. The dynamic pressures, and their influence on the piles? internal forces, were evaluated using a synthetic Ricker wavelet in the numerical FE model. Two kinds of FE models were developed, an approximate 2D-plain strain model and a fully 3D model. The accuracy of the 2D model on predicting static and dynamic lateral pressures was also investigated. |
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| Keywords: | Non-secant anchored piling support Finite element modelling In-situ measurements Dynamic analysis |
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