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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Main Authors: Torrico Bravo Juan Alfredo, Miranda Salvador, Cornellis Wim, Rojas Juan Carlos, Bezuijen Adam, Di Emidio Gemmina
Format: Article
Language:English
Published: EDP Sciences 2021-01-01
Series:MATEC Web of Conferences
Subjects:
Online Access:https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_03004.pdf
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spelling 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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