Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils
For deep excavations in residual soils that are underlain by highly fissured or fractured rocks, it is common to observe the drawdown of the groundwater table behind the excavation, resulting in seepage-induced ground settlement. In this study, finite element analyses are firstly performed to assess...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/149204 |
| _version_ | 1826111300667703296 |
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| author | Goh, Anthony Teck Chee Zhang, R. H. Wang, W. Wang, L. Liu, H. L. Zhang, W. G. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Goh, Anthony Teck Chee Zhang, R. H. Wang, W. Wang, L. Liu, H. L. Zhang, W. G. |
| author_sort | Goh, Anthony Teck Chee |
| collection | NTU |
| description | For deep excavations in residual soils that are underlain by highly fissured or fractured rocks, it is common to observe the drawdown of the groundwater table behind the excavation, resulting in seepage-induced ground settlement. In this study, finite element analyses are firstly performed to assess the critical parameters that influence the ground settlement performance in residual soil deposits subjected to groundwater drawdown. The critical parameters that influence the ground settlement performance were identified as the excavation width, the excavation depth, the depth of groundwater drawdown, the thickness of the residual soil, the average SPT N value of the residual soil, the location of the moderately weathered rock, and the wall system stiffness. Subsequently, an artificial neural network (ANN) model was developed to provide estimates of the maximum ground settlement. Validation of the performance of ANN model was carried out using additional data derived from finite element analyses as well as with measured data from a number of excavation sites. 60 |
| first_indexed | 2024-10-01T02:48:26Z |
| format | Journal Article |
| id | ntu-10356/149204 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:48:26Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1492042021-05-23T15:35:26Z Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils Goh, Anthony Teck Chee Zhang, R. H. Wang, W. Wang, L. Liu, H. L. Zhang, W. G. School of Civil and Environmental Engineering Engineering::Civil engineering Excavation Residual Soils For deep excavations in residual soils that are underlain by highly fissured or fractured rocks, it is common to observe the drawdown of the groundwater table behind the excavation, resulting in seepage-induced ground settlement. In this study, finite element analyses are firstly performed to assess the critical parameters that influence the ground settlement performance in residual soil deposits subjected to groundwater drawdown. The critical parameters that influence the ground settlement performance were identified as the excavation width, the excavation depth, the depth of groundwater drawdown, the thickness of the residual soil, the average SPT N value of the residual soil, the location of the moderately weathered rock, and the wall system stiffness. Subsequently, an artificial neural network (ANN) model was developed to provide estimates of the maximum ground settlement. Validation of the performance of ANN model was carried out using additional data derived from finite element analyses as well as with measured data from a number of excavation sites. 60 Accepted version 2021-05-23T15:35:25Z 2021-05-23T15:35:25Z 2019 Journal Article Goh, A. T. C., Zhang, R. H., Wang, W., Wang, L., Liu, H. L. & Zhang, W. G. (2019). Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils. Acta Geotechnica, 15(5), 1259-1272. https://dx.doi.org/10.1007/s11440-019-00843-5 1861-1125 0000-0001-6051-1388 https://hdl.handle.net/10356/149204 10.1007/s11440-019-00843-5 2-s2.0-85068183954 5 15 1259 1272 en Acta Geotechnica © 2019 Springer-Verlag Berlin Heidelberg. This is a post-peer-review, pre-copyedit version of an article published in Acta Geotechnica. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11440-019-00843-5 application/pdf |
| spellingShingle | Engineering::Civil engineering Excavation Residual Soils Goh, Anthony Teck Chee Zhang, R. H. Wang, W. Wang, L. Liu, H. L. Zhang, W. G. Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title | Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title_full | Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title_fullStr | Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title_full_unstemmed | Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title_short | Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| title_sort | numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils |
| topic | Engineering::Civil engineering Excavation Residual Soils |
| url | https://hdl.handle.net/10356/149204 |
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