Subgrade Soil Parameters And Soil-based Classification

Through analyzing the relationship between CBR and modulus of resilience of subgrade ,this paper establishes the revelance relation of modulus of resilience and CBR .Secondly,analyzing water content influence to different soil and the stability of soil,the paper demonstrate the impact of water content to subgrade arriving or accessing stability degree of thickness at the subgrade moulding times.thirdly ,analyzing the distinction of light and heavy compaction criterion,the influence of degree of compaction to soil deformation and intensity,this paper establishes the relevance relation of modulus of resilience and degree of compaction,the relation of modulus of resilience and water content.Forthly,based on laboratory test and outdoor's investigation are analysed in this paper ,correlation equations between indoor's modulus of resilience and outdoor's modulus of resilience are established .At last,through analyzing the typical soil of Shan'xi,the principle of classifying subgrade grades are put forward ,the grades of subgrade strength of Shan'xi are determined.