On the Influence Factors of Mechanical Properties for Soil-Rock Mixture

Soil-rock mixture,which is made from such as high strength rock-block,low strength soil filling ingredient and corresponding pores,is a kind of complex multi-phase geological materials.Many geological disasters occurred in Chinese central and western regions are close related with its shear strength.The mechanical properties of soil-rock mixture are affected by many factors.In this paper,using large-size shear test under flexibility boundary condition,the influence of rock on shearing strength of soil-rock mixture was studied from three aspects: such as rock content,rock arrangement and size of block-stone.Through orthogonal test,the essentiality and its significance of above-mentioned three factors were studied.Results show that among three factors the size of block-stone has most important influence on the shear properties of soil-rock mixture,the stone content takes the second position,and the arrangement of block-rocks takes the third one.