Large Longitudinal Slope Of Asphalt Pavement Deformation Mechanism Analysis

With the rapid development of highway construction, more and more asphaltpavement pass through mountainous areas,so route design will inevitably encounter theproblem of slope, and the large longitudinal slope asphalt pavement is the rut diseaseserious section, so it has a great impact on traffic safety and traffic capacity. Therefore, tocarry out the large longitudinal slope of Asphalt Pavement Rutting mechanism analysis isvery necessary.This paper firstly discusses the definition of large longitudinal slope of asphaltpavement. Then through the BISAR software analysis of asphalt pavement in differentslope conditions, pavement with different depth of compressive stress, shear stressdistribution and the level of stress. And through the investigation based on actual road,obtain the spatial distribution characteristics of large longitudinal slope asphalt pavementof rutting, And put forward the rutting causes.Through the experimental study on dynamic modulus of different temperature andfrequency, Derive the dynamic modulus master curve of AC13asphalt mixture, andanalyzes the equivalent of influence on asphalt mixture creep between time andtemperature. Application of nonlinear viscoelastic body time temperature equivalenceprinciple, deduces the shift factors at different temperature relative to the referencetemperature, and then from the time-temperature equivalent principle, analyzes theinfluence of temperature and time on the asphalt pavement rutting.According to the traffic characteristics heavy and slow of large longitudinal slopeasphalt pavement, design rutting test of multiple factors, research the effects of temperature,speed and load on rutting, each layer of permanent deformation, shear stress andcompressive stress, obtain the rules of stress and strain. according to the analysis of datafrom the curve, it was found that three factors will lead to increased shear stress, therebyincreasing the rut disease. Carry on the numerical simulation of permanent deformation of asphalt pavementwith the finite element software ABAQUS, analyzes the effects of temperature, speed andload on rutting, each layer of permanent deformation of asphalt pavement, shear stress andcompressive stress, the analysis results are in good agreement with the actual test results,discovery each layer of permanent deformation is relate to the distribution of the shearstress, and the proportion of each layer of permanent deformation is consistent with theconclusion of the field investigation.Finally, combining the above analysis of the large longitudinal slope of AsphaltPavement Rutting mechanism, puts forward corresponding prevention suggestions fromthe angle of active control.