Performance of Micropiled-Raft Foundations in Sand
Micropiles were first used to repair the damaged structures of “Scuola Angiulli” in Naples after World War II. They are known as small versions of regular piles, with a diameter of less than 30 cm, and are made of high-strength, steel casing and/or threaded bars, produce minimal noise and vibration...
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MDPI AG
2024-10-01
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| author | Adel Hanna Farhad Nabizadeh |
| author_facet | Adel Hanna Farhad Nabizadeh |
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| description | Micropiles were first used to repair the damaged structures of “Scuola Angiulli” in Naples after World War II. They are known as small versions of regular piles, with a diameter of less than 30 cm, and are made of high-strength, steel casing and/or threaded bars, produce minimal noise and vibration during installation, and use lightweight machinery. They are capable to withstand axial loads and moderate lateral loads. They are used for underpinning existing foundations and to restore historical buildings and to support moderate structures. In the literature, several reports can be found dealing with micropiles, yet little has been reported on Micropiled-Raft Foundations (MPR). This technology did not receive the recognition it deserved until the 1970s when its technical and economic benefits were noted. A series of laboratory tests and numerical modeling were developed to examine the parameters governing the performance of MPR, including the relative density of the sand, the micropile spacing, and the rigidity of the raft. The numerical model, after being validated with the present experimental results, was used to generate data for a wide range of governing parameters. The theory developed by Poulos (2001) (PDR) to predict the capacity of pile-raft foundations was adopted for the design of MPR. The PDR method is widely used by geotechnical engineers because of its simplicity. |
| format | Article |
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| institution | Kabale University |
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| spelling | doaj-art-f035d3bd216547bba9bf3aa80ba11b9e2024-12-27T14:28:23ZengMDPI AGGeotechnics2673-70942024-10-01441065108010.3390/geotechnics4040054Performance of Micropiled-Raft Foundations in SandAdel Hanna0Farhad Nabizadeh1Department of Building, Civil and Environmental Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montreal, QC H3G 1M8, CanadaDepartment of Building, Civil and Environmental Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montreal, QC H3G 1M8, CanadaMicropiles were first used to repair the damaged structures of “Scuola Angiulli” in Naples after World War II. They are known as small versions of regular piles, with a diameter of less than 30 cm, and are made of high-strength, steel casing and/or threaded bars, produce minimal noise and vibration during installation, and use lightweight machinery. They are capable to withstand axial loads and moderate lateral loads. They are used for underpinning existing foundations and to restore historical buildings and to support moderate structures. In the literature, several reports can be found dealing with micropiles, yet little has been reported on Micropiled-Raft Foundations (MPR). This technology did not receive the recognition it deserved until the 1970s when its technical and economic benefits were noted. A series of laboratory tests and numerical modeling were developed to examine the parameters governing the performance of MPR, including the relative density of the sand, the micropile spacing, and the rigidity of the raft. The numerical model, after being validated with the present experimental results, was used to generate data for a wide range of governing parameters. The theory developed by Poulos (2001) (PDR) to predict the capacity of pile-raft foundations was adopted for the design of MPR. The PDR method is widely used by geotechnical engineers because of its simplicity.https://www.mdpi.com/2673-7094/4/4/54micropilessandcap rigiditypile’s spacingrelative densityload-sharing mechanism experimental investigation |
| spellingShingle | Adel Hanna Farhad Nabizadeh Performance of Micropiled-Raft Foundations in Sand Geotechnics micropiles sand cap rigidity pile’s spacing relative density load-sharing mechanism experimental investigation |
| title | Performance of Micropiled-Raft Foundations in Sand |
| title_full | Performance of Micropiled-Raft Foundations in Sand |
| title_fullStr | Performance of Micropiled-Raft Foundations in Sand |
| title_full_unstemmed | Performance of Micropiled-Raft Foundations in Sand |
| title_short | Performance of Micropiled-Raft Foundations in Sand |
| title_sort | performance of micropiled raft foundations in sand |
| topic | micropiles sand cap rigidity pile’s spacing relative density load-sharing mechanism experimental investigation |
| url | https://www.mdpi.com/2673-7094/4/4/54 |
| work_keys_str_mv | AT adelhanna performanceofmicropiledraftfoundationsinsand AT farhadnabizadeh performanceofmicropiledraftfoundationsinsand |