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In order to study the unsaturated, remolded strength characteristics of loess, loess in a region of Gansu is selected for remolded samples. By using direct shear apparatus for unsaturated soils made by GDS of the UK, 12 unsaturated direct shear tests are made. The test results show that the stress-strain curve ofthe rebuilding unsaturated loess is strain hardening or weak strain softening. In addition, comparison of different matric suction under the conditions of the stress- strain curve shows that, along with the increase of matrix suction, unsaturated loess shear stress increases. In the same matric suction, shear stress increases gradually with increase of vertical load. In the analysis of the curve of cohesion C and matrix suction of unsaturated loess, the cohesion and matric suction of C was in low suction range linear growth relationship, so that the double variable strength formula is suitable for the loess in that region, and the friction angle related to the matric suction is φh =2.23 °.
In order to study the unsaturated, remolded strength characteristics of loess, loess in a region of Gansu is selected for remolded samples. By using direct shear apparatus for unsaturated soils made by GDS of the UK, 12 unsaturated direct shear tests are made. The test results show that the stress-strain curve ofthe rebuilding unsaturated loess is strain hardening or weak strain softening. In addition, comparison of different matric suction under the conditions of the stress- strain curve shows that, along with the increase of matrix suction, unsaturated loess shear stress increases. In the same matric suction, shear stress increases gradually with increase of vertical load. In the analysis of the curve of cohesion C and matrix suction of unsaturated loess, the cohesion and matric suction of C was in low suction range linear growth relationship, so that the double variable strength formula is suitable for the loess in that region, and the friction angle related to the matric suction is φh =2.23 °.
Experimental Study on Strength Characteristics of Unsaturated Remolded Loess
Second International Conference on Geotechnical and Earthquake Engineering ; 2013 ; Chengdu, China
IACGE 2013 ; 779-785
2013-10-09
Conference paper
Electronic Resource
English
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