Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure
In the design of a cantilever retaining wall, magnitude and distribution of earth pressures are often determined using classical earth pressure theories. This is under the assumption that sufficient deformations will occur to allow for full development of active earth pressure behind the wall and pa...
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sg-ntu-dr.10356-710842023-03-03T17:16:30Z Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure Lay, Abigail Yan Jun Teh Cee Ing School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical In the design of a cantilever retaining wall, magnitude and distribution of earth pressures are often determined using classical earth pressure theories. This is under the assumption that sufficient deformations will occur to allow for full development of active earth pressure behind the wall and partial mobilization of passive pressures in front of the wall. However, during serviceability state, actual lateral pressures might not reach its limiting values, thus making determination of lateral pressures difficult. To simulate backfilling as close as possible using staged construction, lateral pressures acting on both sides of the cantilever gravity wall is analysed with a numerical model constructed using PLAXIS. Mohr-Coulomb model is chosen as the soil’s constitutive model after generation of considerably reasonable predictions of wall displacements during validation of the material model. With a wall designed for stability in accordance to EC7 standards, results of parametric studies revealed that for walls with a shorter heel, surcharge, weaker friction along the wall base, varied stiffness of the foundation soil, lateral pressures on the active side agrees well with the Log-Spiral theory for the top two-thirds of the wall stem. For a wall with partial roughness, predicted lateral pressures abide to the values proposed by Coulomb for top one-third of wall stem. From the global factor of safety generated using phi-c reduction, passive pressures were able to provide considerable amount of stabilization to the overall wall system. Bachelor of Engineering (Civil) 2017-05-15T04:24:24Z 2017-05-15T04:24:24Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/71084 en Nanyang Technological University 98 p. application/pdf |
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DRNTU::Engineering::Civil engineering::Geotechnical Lay, Abigail Yan Jun Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
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In the design of a cantilever retaining wall, magnitude and distribution of earth pressures are often determined using classical earth pressure theories. This is under the assumption that sufficient deformations will occur to allow for full development of active earth pressure behind the wall and partial mobilization of passive pressures in front of the wall. However, during serviceability state, actual lateral pressures might not reach its limiting values, thus making determination of lateral pressures difficult.
To simulate backfilling as close as possible using staged construction, lateral pressures acting on both sides of the cantilever gravity wall is analysed with a numerical model constructed using PLAXIS. Mohr-Coulomb model is chosen as the soil’s constitutive model after generation of considerably reasonable predictions of wall displacements during validation of the material model. With a wall designed for stability in accordance to EC7 standards, results of parametric studies revealed that for walls with a shorter heel, surcharge, weaker friction along the wall base, varied stiffness of the foundation soil, lateral pressures on the active side agrees well with the Log-Spiral theory for the top two-thirds of the wall stem. For a wall with partial roughness, predicted lateral pressures abide to the values proposed by Coulomb for top one-third of wall stem. From the global factor of safety generated using phi-c reduction, passive pressures were able to provide considerable amount of stabilization to the overall wall system. |
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Teh Cee Ing |
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Teh Cee Ing Lay, Abigail Yan Jun |
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Final Year Project |
author |
Lay, Abigail Yan Jun |
author_sort |
Lay, Abigail Yan Jun |
title |
Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
title_short |
Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
title_full |
Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
title_fullStr |
Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
title_full_unstemmed |
Finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
title_sort |
finite element analysis of a cantilever retaining wall : deflection and lateral earth pressure |
publishDate |
2017 |
url |
http://hdl.handle.net/10356/71084 |
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1759857493924642816 |