AUTHOR=Du Yuxiang , Fu Xiaodong , Sheng Qian , Zhang Zhenping , Du Wenjie , Ding Haifeng , Liu Tingting TITLE=A quantitative description method for the mechanical behavior of soil-rock mixture as affected by water content JOURNAL=Frontiers in Ecology and Evolution VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/ecology-and-evolution/articles/10.3389/fevo.2023.1249657 DOI=10.3389/fevo.2023.1249657 ISSN=2296-701X ABSTRACT=
The mechanical properties of soil rock mixture (S-RM) are complex, especially the strength deterioration after encountering water, which readily leads to engineering instability. A series of large triaxial tests of S-RM with different water contents under various confining pressures were performed, the mechanical properties of S-RM were explored from a macroscopic perspective. The constitutive model of S-RM – an extended Duncan-Chang (DC) model considering water content – was developed. The results show that: (a) the stress-strain curves of S-RM are strain hardening type, the peak strength decreases non-linearly with the increase of water content, the higher the water content of sample, the more significant the bulging phenomenon and the more numerous and extensive the surface cracks; (b) the cohesion