Finite element analysis of excavation in residual soils

In this study, the finite element software PLAXIS 2D software is used to study the behavior of deep excavations in deposits of Bukit Timah Granite. Analyses were carried out to assess the parameters that influence the performance of the excavation system such as the diaphragm wall deflection and ben...

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Main Author: Andy
Other Authors: Goh Teck Chee, Anthony
Format: Final Year Project
Language:English
Published: 2016
Subjects:
Online Access:http://hdl.handle.net/10356/67294
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-672942023-03-03T16:59:11Z Finite element analysis of excavation in residual soils Andy Goh Teck Chee, Anthony School of Civil and Environmental Engineering DRNTU::Engineering In this study, the finite element software PLAXIS 2D software is used to study the behavior of deep excavations in deposits of Bukit Timah Granite. Analyses were carried out to assess the parameters that influence the performance of the excavation system such as the diaphragm wall deflection and bending moment as well as the forces in the supporting struts. The parameters considered include the groundwater level, permeability of soils, Young Modulus, soil cohesion and friction angle and also wall stiffness. A total of sixteen cases were considered. The results indicate that in most cases, wall deflections and maximum bending moment have a strong correlation to the soil’s elastic modulus and friction angle where an increase in the parameters would result in decreasing moment and deflection. In addition, maximum struts forces are observed to correlate very well to these parameters except for the first level struts. Due to kick back of the wall, the first level struts could be in tension instead of compression state. This is especially observed in cases with weaker parameters overall. The results obtained in this study demonstrated the sensitivity of the soil properties to the safety of the excavation, which calls for thorough soil investigation in any major excavation. Bachelor of Engineering (Civil) 2016-05-13T07:13:22Z 2016-05-13T07:13:22Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/67294 en Nanyang Technological University 51 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Andy
Finite element analysis of excavation in residual soils
description In this study, the finite element software PLAXIS 2D software is used to study the behavior of deep excavations in deposits of Bukit Timah Granite. Analyses were carried out to assess the parameters that influence the performance of the excavation system such as the diaphragm wall deflection and bending moment as well as the forces in the supporting struts. The parameters considered include the groundwater level, permeability of soils, Young Modulus, soil cohesion and friction angle and also wall stiffness. A total of sixteen cases were considered. The results indicate that in most cases, wall deflections and maximum bending moment have a strong correlation to the soil’s elastic modulus and friction angle where an increase in the parameters would result in decreasing moment and deflection. In addition, maximum struts forces are observed to correlate very well to these parameters except for the first level struts. Due to kick back of the wall, the first level struts could be in tension instead of compression state. This is especially observed in cases with weaker parameters overall. The results obtained in this study demonstrated the sensitivity of the soil properties to the safety of the excavation, which calls for thorough soil investigation in any major excavation.
author2 Goh Teck Chee, Anthony
author_facet Goh Teck Chee, Anthony
Andy
format Final Year Project
author Andy
author_sort Andy
title Finite element analysis of excavation in residual soils
title_short Finite element analysis of excavation in residual soils
title_full Finite element analysis of excavation in residual soils
title_fullStr Finite element analysis of excavation in residual soils
title_full_unstemmed Finite element analysis of excavation in residual soils
title_sort finite element analysis of excavation in residual soils
publishDate 2016
url http://hdl.handle.net/10356/67294
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