The effects of internal erosion on granular soils used in transport embankments
The flooding of embankments used for rail and other infrastructure has the potential to cause lasting weakening of slopes via the movement of fine particles induced by seepage. In laboratory experiments, internal erosion was induced in granular soil samples, with properties consistent with those use...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-02-01
|
| Series: | Soils and Foundations |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0038080624000027 |
| _version_ | 1797304638080286720 |
|---|---|
| author | I. Johnston W. Murphy J. Holden |
| author_facet | I. Johnston W. Murphy J. Holden |
| author_sort | I. Johnston |
| collection | DOAJ |
| description | The flooding of embankments used for rail and other infrastructure has the potential to cause lasting weakening of slopes via the movement of fine particles induced by seepage. In laboratory experiments, internal erosion was induced in granular soil samples, with properties consistent with those used to construct transportation embankments, to assess how particle migration through, and out of, samples caused shear wave velocity, strength, stiffness and permeability changes. Shear wave velocity changes, measured using horizontal bender elements, of up to 19 % were observed following fine particle removal of up to 1 % of initial sample mass. Shear wave velocity change was found to be an indicator for identifying the development of permeability change during seepage-induced particle migration. Median measured permeability changes were +5 % and −34 % for samples containing 15 % and 30 % fines, respectively. The largest directly observed permeability and shear wave velocity changes occurred during the initial stages of seepage. Negative correlation was observed between mass of material removed from samples and peak friction angle. Following seepage, soils displayed a dual stiffness behaviour. Stiffness and strength changes were attributed to redistribution of fine particles and opening of pore spaces. Our results have implications for the monitoring of earthworks affected by flooding and seepage as the associated redistribution of fine particles may lead to large changes in slope properties. |
| first_indexed | 2024-03-08T00:13:17Z |
| format | Article |
| id | doaj.art-a4f4038c385d421f8cd8e7eb748e7c61 |
| institution | Directory Open Access Journal |
| issn | 2524-1788 |
| language | English |
| last_indexed | 2024-03-08T00:13:17Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Soils and Foundations |
| spelling | doaj.art-a4f4038c385d421f8cd8e7eb748e7c612024-02-17T06:37:10ZengElsevierSoils and Foundations2524-17882024-02-01641101424The effects of internal erosion on granular soils used in transport embankmentsI. Johnston0W. Murphy1J. Holden2School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK; water@leeds, School of Geography, University of Leeds, Leeds LS2 9JT, UK; Corresponding author.School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UKwater@leeds, School of Geography, University of Leeds, Leeds LS2 9JT, UKThe flooding of embankments used for rail and other infrastructure has the potential to cause lasting weakening of slopes via the movement of fine particles induced by seepage. In laboratory experiments, internal erosion was induced in granular soil samples, with properties consistent with those used to construct transportation embankments, to assess how particle migration through, and out of, samples caused shear wave velocity, strength, stiffness and permeability changes. Shear wave velocity changes, measured using horizontal bender elements, of up to 19 % were observed following fine particle removal of up to 1 % of initial sample mass. Shear wave velocity change was found to be an indicator for identifying the development of permeability change during seepage-induced particle migration. Median measured permeability changes were +5 % and −34 % for samples containing 15 % and 30 % fines, respectively. The largest directly observed permeability and shear wave velocity changes occurred during the initial stages of seepage. Negative correlation was observed between mass of material removed from samples and peak friction angle. Following seepage, soils displayed a dual stiffness behaviour. Stiffness and strength changes were attributed to redistribution of fine particles and opening of pore spaces. Our results have implications for the monitoring of earthworks affected by flooding and seepage as the associated redistribution of fine particles may lead to large changes in slope properties.http://www.sciencedirect.com/science/article/pii/S0038080624000027SuffusionBender elementsEmbankmentFloodingSeepageStiffness |
| spellingShingle | I. Johnston W. Murphy J. Holden The effects of internal erosion on granular soils used in transport embankments Soils and Foundations Suffusion Bender elements Embankment Flooding Seepage Stiffness |
| title | The effects of internal erosion on granular soils used in transport embankments |
| title_full | The effects of internal erosion on granular soils used in transport embankments |
| title_fullStr | The effects of internal erosion on granular soils used in transport embankments |
| title_full_unstemmed | The effects of internal erosion on granular soils used in transport embankments |
| title_short | The effects of internal erosion on granular soils used in transport embankments |
| title_sort | effects of internal erosion on granular soils used in transport embankments |
| topic | Suffusion Bender elements Embankment Flooding Seepage Stiffness |
| url | http://www.sciencedirect.com/science/article/pii/S0038080624000027 |
| work_keys_str_mv | AT ijohnston theeffectsofinternalerosionongranularsoilsusedintransportembankments AT wmurphy theeffectsofinternalerosionongranularsoilsusedintransportembankments AT jholden theeffectsofinternalerosionongranularsoilsusedintransportembankments AT ijohnston effectsofinternalerosionongranularsoilsusedintransportembankments AT wmurphy effectsofinternalerosionongranularsoilsusedintransportembankments AT jholden effectsofinternalerosionongranularsoilsusedintransportembankments |