| Budget Amount *help |
¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
In this study, a series of permeability tests and triaxial compression tests were conducted using x-ray tomography in order to visualize the process of occurrence of internal erosion, in which the effect of confining pressure on internal erosion is investigated. Under two different confining pressures, considering soils located near surface and rather deep in ground, the specimens were tested. In addition, CT image analyses including segmentation and morphology analysis were carried out to clearly visualize the distribution of the pore water phase as a result of internal erosion.
From the experimental results, it has been found that a rise in confining pressure strengthens the resistance of soils to internal erosion. Morphology analysis clarified the development of water pathway in the specimens due to non-homogeneous internal erosion. Furthermore, Macroscopic strength and stiffness of the soils degrade due to the internal erosion.
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