Experiment Measurement of the Dry Density Variations and Shear Stress with the Different Depth Variations

Abstract

Thy Truc Doan

Evaluation of the dry density variations and shear stress with the different depth variations were shown clearly with the particular process. Results show the Dry unit weight (density) increases gradually with the increase of different depths. The biggest dry density was obtained at 1.582 g/cm3 at 18.3m depth of boreholes (“HK1, 2, and 3”); whereas the lowest value was obtained at 0.74 g/cm3 at 4.3m depth. On the other hand, the dry density changed with the constant loading process. The biggest dry density is 1.954 g/cm3 at 18.3m depth and the lowest value is 1.482 g/cm3 at 8.3m depth (before loading); The biggest value is 2.074 g/cm3 at 18.3m depth and the lowest value is 1.621 g/cm3 at 8.3m depth (after loading). Moreover, shear stress was measured carefully at different depths. At the Clay layer, the lowest value is τ1 with 0.052 kG/cm2 at 4.8m depth; whereas the biggest is τ3 with 1.750 kG/cm2 at 39.6m depth. The biggest value is τ2 with 1.276 kG/cm2 at 17.8m depth. At the Sand layer, the lowest value is τ1 with 0.586 kG/cm2 at 29.8m depth; whereas the biggest is τ3 with 1.750 kG/cm2 at 39.6m depth and τ2 with 1.21 kG/cm2 at 36.0m depth.

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