Experimental Research On Impact Feature Of Rock-soil Mixed Material

In the western of China, there are intricate terrains and many hilly regions. With the extending of construction of freeway to the western, soil-aggregate mixture which has been given birth to by hill explosion and cutting has gradually been the main filling of the roadbed of freeway. But physical and mechanical characteristics of the soil-aggregate mixture compared with those of conventional roadbed filling of fine material have more differences. At present, the comprehensively systematically in-depth study on physical and mechanical characteristics of the soil-aggregate mixture and solutions of problems related to roadbed built by soils and rocks have already been concerned by the academe and engineers.Soil-aggregate mixture is a aggregative material which is composed of fine particles and coarse particles and has certain graduation and cohesion. And physical and mechanical characteristics of soil-aggregate mixture have direct relationship with some factors such as the characteristics of fine particles and coarse particles, different ratio of soils and rocks etc. In the thesis the characteristics of soil-aggregate mixture are analyzed and researched through indoors test ( vibrating compaction test, compress test, direct shear test, large triaxial text and so on ), in situ test (rollaring test, field shear test ), and PFC2D digital simulation method on the base of the II-stage roadbed project of YU-QIAN Road according to the existing research achievements. And some important instructive conclusions for the construction are drawn. Finally some suggestions for the study of physical and mechanical characteristics of soil-aggregate mixture are put up forward.