Abstract
Hydrofracturing phenomena in soil grounds were reported. The laboratory investigations on the hydrofracturing phenomenon of the sandy soils as well as the cohesive soils were performed. In sandy soils, the direction of hydrofracture was vertical in most cases under the isotropic stress condition. The hydrofracturing pressure of sandy soils is related to the tensile stress around the borehole and the permeability, and increases as the permeability of sand increases. If the permeability is small enough, the tensile failure is easily generated and the cracks are extended. In cohesive soils, the horizontal or inclined hydrofracture as well as the vertical hydrofracture generates, the hydrofracturing pressure of cohesive soil is related to the minimum confining pressure and the unconfined compression strength. And the possibility of horizontal or inclined fracture to take place increases as the unconfined compression strength of cohesive soil becomes smaller. The hydrofracturing pressure of cohesive soil would be the pressure which is needed to extend and progress the cracks caused by the shear failure around the borehole. The hydrofracturing pressure is generally much smaller than the fracturing pressure by the rubber balloon, because the pressurization by the injection water could easily generate the wedge action. (29 figs, 3 tabs,
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Citation Formats
Mori, Akira, and Tamura, Masahito.
Hydrofracturing phenomena in soil grounds.
Japan: N. p.,
1988.
Web.
Mori, Akira, & Tamura, Masahito.
Hydrofracturing phenomena in soil grounds.
Japan.
Mori, Akira, and Tamura, Masahito.
1988.
"Hydrofracturing phenomena in soil grounds."
Japan.
@misc{etde_6951610,
title = {Hydrofracturing phenomena in soil grounds}
author = {Mori, Akira, and Tamura, Masahito}
abstractNote = {Hydrofracturing phenomena in soil grounds were reported. The laboratory investigations on the hydrofracturing phenomenon of the sandy soils as well as the cohesive soils were performed. In sandy soils, the direction of hydrofracture was vertical in most cases under the isotropic stress condition. The hydrofracturing pressure of sandy soils is related to the tensile stress around the borehole and the permeability, and increases as the permeability of sand increases. If the permeability is small enough, the tensile failure is easily generated and the cracks are extended. In cohesive soils, the horizontal or inclined hydrofracture as well as the vertical hydrofracture generates, the hydrofracturing pressure of cohesive soil is related to the minimum confining pressure and the unconfined compression strength. And the possibility of horizontal or inclined fracture to take place increases as the unconfined compression strength of cohesive soil becomes smaller. The hydrofracturing pressure of cohesive soil would be the pressure which is needed to extend and progress the cracks caused by the shear failure around the borehole. The hydrofracturing pressure is generally much smaller than the fracturing pressure by the rubber balloon, because the pressurization by the injection water could easily generate the wedge action. (29 figs, 3 tabs, 24 refs)}
journal = []
volume = {51}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Mar}
}
title = {Hydrofracturing phenomena in soil grounds}
author = {Mori, Akira, and Tamura, Masahito}
abstractNote = {Hydrofracturing phenomena in soil grounds were reported. The laboratory investigations on the hydrofracturing phenomenon of the sandy soils as well as the cohesive soils were performed. In sandy soils, the direction of hydrofracture was vertical in most cases under the isotropic stress condition. The hydrofracturing pressure of sandy soils is related to the tensile stress around the borehole and the permeability, and increases as the permeability of sand increases. If the permeability is small enough, the tensile failure is easily generated and the cracks are extended. In cohesive soils, the horizontal or inclined hydrofracture as well as the vertical hydrofracture generates, the hydrofracturing pressure of cohesive soil is related to the minimum confining pressure and the unconfined compression strength. And the possibility of horizontal or inclined fracture to take place increases as the unconfined compression strength of cohesive soil becomes smaller. The hydrofracturing pressure of cohesive soil would be the pressure which is needed to extend and progress the cracks caused by the shear failure around the borehole. The hydrofracturing pressure is generally much smaller than the fracturing pressure by the rubber balloon, because the pressurization by the injection water could easily generate the wedge action. (29 figs, 3 tabs, 24 refs)}
journal = []
volume = {51}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Mar}
}