A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown
Braced excavation systems are commonly required to ensure stability in construction of basements for shopping malls, underground transportation and other habitation facilities. For excavations in deposits of soft clays or residual soils, stiff retaining wall systems such as diaphragm walls are commo...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/86577 http://hdl.handle.net/10220/49284 |
| _version_ | 1826109671095664640 |
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| author | Zhang, Wengang Goh, Anthony Teck Chee Hou, Zhongjie Wang, Wei Zhang, Runhong |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhang, Wengang Goh, Anthony Teck Chee Hou, Zhongjie Wang, Wei Zhang, Runhong |
| author_sort | Zhang, Wengang |
| collection | NTU |
| description | Braced excavation systems are commonly required to ensure stability in construction of basements for shopping malls, underground transportation and other habitation facilities. For excavations in deposits of soft clays or residual soils, stiff retaining wall systems such as diaphragm walls are commonly adopted to restrain the ground movements and wall deflections in order to prevent damage to surrounding buildings and utilities. The ground surface settlement behind the excavation is closely associated with the magnitude of basal heave and the wall deflections and is also greatly influenced by the possible groundwater drawdown caused by potential wall leakage, flow from beneath the wall, flow from perched water and along the wall interface or poor panel connections due to the less satisfactory quality. This paper numerically investigates the influences of excavation geometries, the system stiffness, the soil properties and the groundwater drawdown on ground surface settlement and develops a simplified maximum surface settlement Logarithm Regression model for the maximum ground surface settlement estimation. The settlements estimated by this model compare favorably with a number of published and instrumented records. |
| first_indexed | 2024-10-01T02:22:04Z |
| format | Journal Article |
| id | ntu-10356/86577 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:22:04Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/865772019-12-06T16:25:05Z A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown Zhang, Wengang Goh, Anthony Teck Chee Hou, Zhongjie Wang, Wei Zhang, Runhong School of Civil and Environmental Engineering Engineering::Civil engineering Ground Surface Settlement Logarithm Regression Braced excavation systems are commonly required to ensure stability in construction of basements for shopping malls, underground transportation and other habitation facilities. For excavations in deposits of soft clays or residual soils, stiff retaining wall systems such as diaphragm walls are commonly adopted to restrain the ground movements and wall deflections in order to prevent damage to surrounding buildings and utilities. The ground surface settlement behind the excavation is closely associated with the magnitude of basal heave and the wall deflections and is also greatly influenced by the possible groundwater drawdown caused by potential wall leakage, flow from beneath the wall, flow from perched water and along the wall interface or poor panel connections due to the less satisfactory quality. This paper numerically investigates the influences of excavation geometries, the system stiffness, the soil properties and the groundwater drawdown on ground surface settlement and develops a simplified maximum surface settlement Logarithm Regression model for the maximum ground surface settlement estimation. The settlements estimated by this model compare favorably with a number of published and instrumented records. Published version 2019-07-11T04:49:20Z 2019-12-06T16:25:05Z 2019-07-11T04:49:20Z 2019-12-06T16:25:05Z 2018 Journal Article Zhang, R., Zhang, W., Goh, A. T. C., Hou, Z., & Wang, W. (2018). A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown. Geomechanics and Engineering, 16(6), 635-642. doi:10.12989/gae.2018.16.6.635 https://hdl.handle.net/10356/86577 http://hdl.handle.net/10220/49284 10.12989/gae.2018.16.6.635 en Geomechanics and Engineering © 2018 Techno-Press, Ltd. All rights reserved. This paper was published by Techno-Press, Ltd. in Geomechanics and Engineering and is made available with permission of Techno-Press, Ltd. 8 p. application/pdf |
| spellingShingle | Engineering::Civil engineering Ground Surface Settlement Logarithm Regression Zhang, Wengang Goh, Anthony Teck Chee Hou, Zhongjie Wang, Wei Zhang, Runhong A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title | A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title_full | A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title_fullStr | A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title_full_unstemmed | A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title_short | A simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| title_sort | simple model for ground surface settlement induced by braced excavation subjected to a significant groundwater drawdown |
| topic | Engineering::Civil engineering Ground Surface Settlement Logarithm Regression |
| url | https://hdl.handle.net/10356/86577 http://hdl.handle.net/10220/49284 |
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