Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns
The use of column-like elements for improving both the settlement performance and bearing capacity of foundations constructed over soft soils is well understood for large groups of columns supporting an infinitely wide load, such as embankments and slabs. However, little is still understood for ligh...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/11/5293 |
| _version_ | 1827665758729011200 |
|---|---|
| author | Athina Grizi Wisam Al-Ani Dariusz Wanatowski |
| author_facet | Athina Grizi Wisam Al-Ani Dariusz Wanatowski |
| author_sort | Athina Grizi |
| collection | DOAJ |
| description | The use of column-like elements for improving both the settlement performance and bearing capacity of foundations constructed over soft soils is well understood for large groups of columns supporting an infinitely wide load, such as embankments and slabs. However, little is still understood for lightly loaded, low-rise structures supported by pad foundations constructed on a finite number of stone columns, particularly when a crust layer is present at the top of the soft soil. In this study, a comprehensive 3D finite element analysis is used to investigate the influence of key design parameters, such as column spacing, column length, footing shape, and the presence of a crust layer, on the settlement behavior of stone columns to support shallow foundations. The results show that the modeling of a well-characterized soft soil profile predicts well the long-term settlement using both drained and undrained analyses. It was found that the presence of a stiff crust layer has a significant influence on the deformational mode of the stone columns which is not captured by laboratory modeling. |
| first_indexed | 2024-03-10T01:32:36Z |
| format | Article |
| id | doaj.art-683cd1d4de824c669b982c734926394f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:32:36Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-683cd1d4de824c669b982c734926394f2023-11-23T13:39:15ZengMDPI AGApplied Sciences2076-34172022-05-011211529310.3390/app12115293Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone ColumnsAthina Grizi0Wisam Al-Ani1Dariusz Wanatowski2Department of Civil Engineering, University of Nottingham, Nottingham NG7 2RD, UKAARSLEFF Ground Engineering Ltd., Newark NG24 3BU, UKSchool of Civil Engineering, University of Leeds, Leeds LS2 9JT, UKThe use of column-like elements for improving both the settlement performance and bearing capacity of foundations constructed over soft soils is well understood for large groups of columns supporting an infinitely wide load, such as embankments and slabs. However, little is still understood for lightly loaded, low-rise structures supported by pad foundations constructed on a finite number of stone columns, particularly when a crust layer is present at the top of the soft soil. In this study, a comprehensive 3D finite element analysis is used to investigate the influence of key design parameters, such as column spacing, column length, footing shape, and the presence of a crust layer, on the settlement behavior of stone columns to support shallow foundations. The results show that the modeling of a well-characterized soft soil profile predicts well the long-term settlement using both drained and undrained analyses. It was found that the presence of a stiff crust layer has a significant influence on the deformational mode of the stone columns which is not captured by laboratory modeling.https://www.mdpi.com/2076-3417/12/11/5293stone columnspad footingsground improvementsoft claysettlementnumerical modeling |
| spellingShingle | Athina Grizi Wisam Al-Ani Dariusz Wanatowski Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns Applied Sciences stone columns pad footings ground improvement soft clay settlement numerical modeling |
| title | Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns |
| title_full | Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns |
| title_fullStr | Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns |
| title_full_unstemmed | Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns |
| title_short | Numerical Analysis of the Settlement Behavior of Soft Soil Improved with Stone Columns |
| title_sort | numerical analysis of the settlement behavior of soft soil improved with stone columns |
| topic | stone columns pad footings ground improvement soft clay settlement numerical modeling |
| url | https://www.mdpi.com/2076-3417/12/11/5293 |
| work_keys_str_mv | AT athinagrizi numericalanalysisofthesettlementbehaviorofsoftsoilimprovedwithstonecolumns AT wisamalani numericalanalysisofthesettlementbehaviorofsoftsoilimprovedwithstonecolumns AT dariuszwanatowski numericalanalysisofthesettlementbehaviorofsoftsoilimprovedwithstonecolumns |