期刊
SOILS AND FOUNDATIONS
卷 52, 期 4, 页码 698-711出版社
JAPANESE GEOTECHNICAL SOC
DOI: 10.1016/j.sandf.2012.07.010
关键词
Internal erosion; Suffusion; Upward seepage test; Hydraulic conductivity change; Strength reduction
资金
- Grants-in-Aid for Scientific Research [23760440] Funding Source: KAKEN
Suffusion, one of the modes of internal erosion, has been widely detected in both natural deposits and filled structures. It is the phenomenon that the fine particles in soil gradually migrate through the voids between the coarse particles, leaving behind the soil skeleton. In this paper, the main focus is on the changes in soil strength due to internal erosion. A series of one-dimensional upward seepage tests at a constant water head is performed to cause internal erosion in a soil sample by controlling the three variable parameters, namely (a) the fine content, (b) the relative density of the soil, and (c) the maximum imposed hydraulic gradient on the specimen. The mechanical consequences of the internal erosion are examined by cone penetration tests. The internal erosion indicated by the loss of fine particles causes changes in the void ratio and a significant increase in hydraulic conductivity, resulting in a decrease in the soil strength from its initial value. (c) 2012 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.
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