Ultrasonic experiment and mechanical properties of rock and soil mixture under triaxial deformation

Autor: Xiaotong Qin, Kai Cui
Rok vydání: 2019
Předmět:
Zdroj: Arabian Journal of Geosciences. 12
ISSN: 1866-7538
1866-7511
DOI: 10.1007/s12517-019-4933-8
Popis: In this paper, the author discussed the real-time ultrasonic experiment and mechanical properties of rock and soil mixture (RSM) in three-axis deformation. Both rock block percentages (RBPs) and confining pressure have a significant influence on the mechanical and ultrasonic properties of RSM. The structure control mechanism of RSM is essentially the interactions between the soil matrix and rock blocks. The experiment result shows that with the increase of RBP, the peak strength of RSM increases when the soil matrix has the same compactness. Stress skip is a special phenomenon during the deformation; this phenomenon becomes obvious with increasing RBP. In addition, the confining pressures acted on the specimens also play an important role in generating stress skip. Specimens with different rock percentage failed by a combination of shear and bulging failures, and the number of macrocracks increases with the increase of rock blocks in RSM specimens. At lower RBP, failure mechanism is dominantly controlled by shear failure pattern; at higher RBP, failure mechanism is primary controlled by bulging failure.
Databáze: OpenAIRE
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