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| Titel: |
Evaluation of the shear stresses under three camera lateral pressures of a Monagas state Ultisol savanna soil of Venezuela |
| Auteur: |
Américo HOSSNE GARCÍA J. CHRISTOPHER E. SANTAELLA J. MALAVER |
| Verschenen in: |
Revista científica UDO agrícola |
| Paginering: | Jaargang 2 (2002) nr. 1 pagina's 73-78 |
| Jaar: |
2002 |
| Inhoud: |
The lateral pressures of a soil due to vertical loads or product of the pressures of the same one, produce effects especially onthe roots. According to Otto Mohr the limit of failure of a material is determined by the tensions in the slip plane. One couldconsider that the radical growth and the maximum traction of tractors happen for effect of Coulomb-Mohr failure of a soilelement. This bears to the possible simulation of a soil specimen under lateral and vertical pressures, when evaluating thefailure of a soil specimen in the triaxial equipment under constant camera pressures. The specific objective consists onevaluating the shear stress (τ), the mayor stress (σ1) and the angle of failure (α) under three constant camera pressures of 60kPa, 120 kPa and 180 kPa at different levels of humidity. In the methodology it was used the triaxial apparatus to determineτ, σ1, α and regression to interpret the proportion of the variance among the parameters. On concludes that the soil resiststhe Coulomb-Mohr failure as the camera pressure increases and it diminishes inversely proportional to the soil humidity andthat the angle of the failure plane diminishes with humidity, the resistance of the soil increases proportionally to the camerapressures and it tends to zero when the humidity comes closer to the liquid limit, the shear stress keeps lineal in function ofthe mayor stress without influence of the pressure cameras and the shear stress stays lineal in function of the vertical loadand the angle of the failure plane versus the chamber pressures of 180 kPa diminishes exponentially with the increase of thehumidity and it falls quickly when passing beyond the field capacity of this soil (11 to 13%). |
| Uitgever: |
Universidad de Oriente Press (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 80 van 185 gevonden artikelen
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