Study on Influence Factors in Design of Asphalt Overlay on Old Cement Concrete Pavement

At present,all of the designs of asphalt overlay on old cement concrete pavement at home and abroad are not perfect,and there is no accepted reasonable and feasible design method.Based on the previous studies,through a three-dimensional finite element analysis program to compute the mechanical response of asphalt overlay with geosynthetics interlayer under the action of load,the influence of parameters like asphalt overlay thickness,asphalt overlay modulus,old cement concrete pavement modulus,geosynthetics modulus,foundation modulus on the stress and deflection in the bottom of asphalt overlay are analyzed.Thus the important factors which should be paid attention to in overlay design method are pointed out,and the design method of asphalt concrete overlay on the old cement concrete pavement considering the reflective cracking is further discussed and explored.