Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand
-Soil compaction in cropping systems, caused by the external pressure of machinery, creates impermeable layers that restrict water and nutrient cycles reducing agricultural production. To evaluate the matric suction effects on distribution with depth of stresses in a soil, caused by the use of agric...
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2021-01-01
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doaj-23e3a016ffdf4e78855acd7f30f3eea92021-05-04T12:21:53ZengEDP SciencesMATEC Web of Conferences2261-236X2021-01-013370300410.1051/matecconf/202133703004matecconf_PanAm-Unsat2021_03004Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sandTorrico Bravo Juan Alfredo0Miranda Salvador1Cornellis Wim2Rojas Juan Carlos3Bezuijen Adam4Di Emidio Gemmina5Department of Civil Engineering, Ghent UniversityFaculty of Civil Engineering, San Francisco Xavier UniversityDepartment of Environment, Ghent UniversityFaculty of Civil Engineering, San Francisco Xavier UniversityLaboratory of Geotechnics, Ghent UniversityDepartment of Civil Engineering, Ghent University-Soil compaction in cropping systems, caused by the external pressure of machinery, creates impermeable layers that restrict water and nutrient cycles reducing agricultural production. To evaluate the matric suction effects on distribution with depth of stresses in a soil, caused by the use of agricultural machinery, Jet Fill tensiometers were installed at two different depths (i.e. 0.15 m, 0.30 m) in a soil profile constituted by silty sand with gravel (SM); to register the increments on subsoil vertical stresses, two miniaturized load cells (i.e. 16. 5 mm in diameter) were installed in a horizontal position under the centre line of the vehicle wheels’ path, at approximately 0.15 m and 0.30 m depth. Care was taken to calibrate the load cells in field conditions. A vehicle was made to pass over the soil surface, at a speed less than 5 km/h; the tyre inflation pressure applied on wheel was 380 kPa. Response of load cells to vehicle loading was evaluated at different average matric suction measured on soil profile. Finally, measured stresses have been compared with values obtained by applying well-known elastic theoretical methods used to assess stresses applied by tyres on bare soils. The corresponding results show that the increment of vertical stresses decreases as matric suction increases, and a good correlation between measurements and simulations of the increment on subsoil vertical stress.https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_03004.pdfkey words:soil compactionmatric suctionvertical stresswheel compressionload cells |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Torrico Bravo Juan Alfredo Miranda Salvador Cornellis Wim Rojas Juan Carlos Bezuijen Adam Di Emidio Gemmina |
spellingShingle |
Torrico Bravo Juan Alfredo Miranda Salvador Cornellis Wim Rojas Juan Carlos Bezuijen Adam Di Emidio Gemmina Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand MATEC Web of Conferences key words: soil compaction matric suction vertical stress wheel compression load cells |
author_facet |
Torrico Bravo Juan Alfredo Miranda Salvador Cornellis Wim Rojas Juan Carlos Bezuijen Adam Di Emidio Gemmina |
author_sort |
Torrico Bravo Juan Alfredo |
title |
Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
title_short |
Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
title_full |
Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
title_fullStr |
Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
title_full_unstemmed |
Matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
title_sort |
matric suction effect on distribution of stresses caused by vehicle wheels on a bare silty sand |
publisher |
EDP Sciences |
series |
MATEC Web of Conferences |
issn |
2261-236X |
publishDate |
2021-01-01 |
description |
-Soil compaction in cropping systems, caused by the external pressure of machinery, creates impermeable layers that restrict water and nutrient cycles reducing agricultural production. To evaluate the matric suction effects on distribution with depth of stresses in a soil, caused by the use of agricultural machinery, Jet Fill tensiometers were installed at two different depths (i.e. 0.15 m, 0.30 m) in a soil profile constituted by silty sand with gravel (SM); to register the increments on subsoil vertical stresses, two miniaturized load cells (i.e. 16. 5 mm in diameter) were installed in a horizontal position under the centre line of the vehicle wheels’ path, at approximately 0.15 m and 0.30 m depth. Care was taken to calibrate the load cells in field conditions. A vehicle was made to pass over the soil surface, at a speed less than 5 km/h; the tyre inflation pressure applied on wheel was 380 kPa. Response of load cells to vehicle loading was evaluated at different average matric suction measured on soil profile. Finally, measured stresses have been compared with values obtained by applying well-known elastic theoretical methods used to assess stresses applied by tyres on bare soils. The corresponding results show that the increment of vertical stresses decreases as matric suction increases, and a good correlation between measurements and simulations of the increment on subsoil vertical stress. |
topic |
key words: soil compaction matric suction vertical stress wheel compression load cells |
url |
https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_03004.pdf |
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