Studies on Artificial Soils (III)

Kneading Effect on Shear Characteristics of Artificial Soils

Abstract

Analyzing the kneading effect on the shearing characteristics of artificial soils under the same kneading conditions as the report No. 2 of this study series, following results were found.
1) Representing the shear stress-displacement curve by an equation proposed by Kacigin and Guskov, the value of the displacement at peak stress K_τ changed slightly with the kneading time.
2) The kneading effect on the shear strength was proved to be significant through an analysis of variance. It was also shown, however, that the shear strengths of Soil A and B approached to constant values after more than 10 minutes kneading time.
3) The kneading effect on the soil values was not apparent due to minority of data. It was shown, however, that the soil values varied at the initial stage of kneading time.
4) Adopting Meyerhof Theory for the ultimate bearing capacity of long footings in order to consider the kneading effect on the penetrating resistance of a plate theoretically in relation to the kneading time effect on the soil values, it was derived that the variation trend of plate penetrating resistance due to kneading time was obtained through the theory. Theoretical values did not coincide with the measured values, and the problem of the measuring accuracy of soil values remained unsolved.