Change of Shearing Properties of Compacted Cohesive Soils as a Result of Soaking and the Compacted Moisture Content

• Published in: Transactions of The Japanese Society of Irrigation, Drainage and Reclamation Engineering Vol. 1980; no. 85; pp. 56 - 62,a1
• Main Author: TORIYAMA, Koshi
• Format: Journal Article
• Language: English; Japanese
• Published: The Japanese Society of Irrigation, Drainage and Rural Engineering 1980
• ISSN: 0387-2335; 1884-7234
• DOI: 10.11408/jsidre1965.1980.56

The influence of soaking and back pressure on the shearing properties of two compacted cohesive soils were tested with the specimens at constant density and various compacted moisture content, ω0. From the obtained results, on the dry side of optimum moisture content, Wopt, the compacted strength, (σ1-σ3) f, and cohesion, c', of samples subjected to soaking and back pressure were smaller than those which were unsoaked.But (σ1-σ3) f, and c' of the.wet side samples of Wopt were scarcely influenced by soaking and back pressure.In the case of unsoaked samples, (σ1-σ3) f and c' decreased with an increase in the compacted moisture content even though the density of samples was constant.On the other hand, (σ1-σ3) f and c' of samples subjected to soaking and back pressure almost received no influence of ω0.The influence of ω0, soaking and back pressure on the internal angle of friction, φ', was relatively small. From these results, it is reasonable to carry out triaxial tests using specimens subjected to soaking and back pressure and to calculate c' and φ' from this data for analysis of the slope stability problems of embankments.