Analysis Of The Influence Of The Soil Base Resilient Modulus To The Pavement Layer

The value of soil base resilient modulus is affected by many factors, these factorsinclude the quality and composition of the soil, water content, degree of compaction and testload and load. Through the analysis of the relationship between resilient modulus of the soilbase and these factors draw the correlation between them and the relevant relationship, andthe relationship between the resilient modulus of the soil base and consistency, degree ofcompaction; it details the resilient modulus test methods to obtain soil-based analysis oftheir respective advantages and disadvantages, and draws the relationship between thedifferent test methods; Through BISAR3.0software to create appropriate pavementstructure model, changing the size of the resilient modulus of the soil base, its pavementsurface deflection, the primary layer bottom stress, tensile stress and subgrade compressivestrain of the sub-base layer bottom, and via the HPDS road design software analyzing effectof resilient modulus of the soil base to every group of layer thickness. Because of overloadserious situation, uses BISAR3.0software to analyze the different overloading under thepavement surface deflection, the primary layer bottom stress, the subbase layer bottomstress and the top of the subgrade surface pressure strain change, concludes improving soilbase resilient modulus can be effectively offset the impact of overloading these factors; thisarticle takes large heavy construction machinery into road construction into account, on theone hand, it speeds up the progress of the construction, shortens the construction period, buton the other hand, heavy construction machinery may cause pavement structure destructionwhen the road pavement has not completed, and set risks for the normal use of the road inthe future, and shorten the life of the road. This article analyzes the impact of constructionmachinery to the road base and sub-base layer bottom tensile stress during the construction.Finally, combined with frature mechanics, analyzes connection between the crackpropagation in semi-rigid base and soil base resilient modulus.