Comparative Study on Triaxial Test of Undisturbed and Remolded Loess

Abstract

The difference of sample preparation methods will directly lead to the difference of the structure of the sample, and the mechanical response characteristics under external load will be different. Based on the conventional tests such as particle analysis, specific gravity, critical moisture content, and consolidation test of undisturbed loess from Xi’an, this paper focuses on the static triaxial consolidated drained shear and consolidated undrained shear tests on undisturbed and remolded loess. The results show that: (1) the structure has an obvious influence on the stress-strain relationship of the sample, the stress-strain curve of the undisturbed sample is a strain softening curve, and the stress-strain curve of the remolded sample is a weak strain hardening curve; (2) under the same loading conditions, the triaxial shear strength of the undisturbed soil is significantly higher than that of the remolded soil; (3) the change rule of the consolidation ratio of undisturbed and remolded samples is basically the same, but the final consolidation ratio of remolded soil is greater than that of undisturbed soil.

Comprehensive Characterization of Soils with Analytical and Numerical Simulation for Bearing Capacity and Settlement Requirements of the Footing

“…Advances in Materials Science and Engineering temperature and fner than 2.36mm have been prepared by keeping density and moisture content in order to maintain the natural condition of soils.. Soil specimen for every test pit was placed on the unconfned compressive machine and a 300 kN load was applied axially to produce axial strain at a rate of approximately 1%/min (0.76 mm/min) of the specimen height [22][23][24][25]. Deformation and axial load readings had been recorded till the soil sample failed from which axial pressure and strain had been calculated and plotted to decide the unconfned compressive strength and undrained cohesion.…”

Investigation of the Structural Strength of Expansive Soil in a Seasonally Frozen Region

“…Special soils mainly include loess, laterite, expansive soil, and saline soil [5]. Researchers have discussed the structural strength of loess by combining damage and soil mechanics and considering consolidation pressure, structural disturbance, and wet-dry cycles [6][7][8]. As for laterite, the cementation of free iron oxide provides structural strength, which leads to better compressive and mechanical properties of the undisturbed soil [3,9].…”