土石混合料力学特性和颗粒破碎研究OA

Based on the indoor triaxial apparatus,the undrained consolidation tests of soil-rock mix-tures with five different rock contents and three different confining pressures were carried out.By analy-zing the stress-strain curve,strength parameters and particle crushing law,the mechanical properties and crushing characteristics of soil-rock mixture are discussed.The experimental data show that there is a posi-tive correlation between the rock content and the relative fragmentation rate,and the trend of the relative fragmentation rate will gradually decrease with the increase of confining pressure,which accords with the Allometricl function model.In addition,the increase of stone content can improve the strength of soil-stone mixture,and the internal friction angle has a"slow-fast-slow"growth law with the"Low-middle-high"of stone content.The Boltzmann function model can describe this rule well and has some applicabili-ty.The cohesion of soil-rock mixture is greater when the stone content is low,and when the stone content is high,the cohesion decreases to a certain extent before slowly increasing with the increase of stone con-tent.