Memoirs of the faculty engneering, Yamaguchi university
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Memoirs of the faculty engneering, Yamaguchi university Volume 69 Issue 2
published_at 2019-03
Shear behavior of soil affected by internal erosion due to seepage in triaxial test apparatus
三軸試験装置における内部侵食の影響を受けた土のせん断挙動
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Descriptions
Internal erosion is one of the causes of aging of embankment for reservoir. Embankment is influenced by seepage flow over a long time period, and there is a possibility that fine fraction moved by seepage flow. The present work implemented triaxial confining compression tests to investigate how a small internal erosion affects soil strength. In this study, shear test was conducted after seepage flow occurred inside the specimen. As a result, the outflow of fine fraction was observed by seepage flow, but there was no chage in the peak strength and residual strength, and only the initial part of the stress strain relationship was slightly affected. In this study, we inferred that decline of permeability and clogged void is occurring by outflow of fine fraction.
Creator Keywords
triaxial compression test
internal erosion
fine fraction
Other Article
PP. 9 - 14