RESEARCH STATUS AND PROSPECT OF ROCK AND SOIL AGGREGATE

Rock and soil aggregate(RSA) is a special kind of geological materials, which is different from soil and fractured rock mass. Recently, RSA is drawn more and more attention from engineering and academia circles. Deep research on the meso-structure, physical and mechanical properties of RSA is not only the need of the engineering construction, but also the inevitable result of theory rock and soil mechanics, calculation of geotechnical mechanics, experimental rock and soil mechanics. Based on the current research for RSA about mesoscopic characteristic home and abroad, the research status of RSA is summarized in term of meso-structure characteristics, meso-structure model and the meso-mechanics characteristic. On the basis of this, shortcomings of meso-scale characteristic research are summarized, point out that carrying out different meso-scale real-time loading tests to analysis local deformation characteristics for RSA is the future direction. The trends of the future research include establishing meso-scale damage evolution equation and the constitutive equation, strengthening research about environment-dependence of RSA, and establishment full-field structure model on meso-scale tests revealing the microstructure evolution under real-time loading condition.