Thickness sensitivity of the airport cement concrete pavement overlay

In order to study the influence of calculation parameters for the airport cement concrete pavement on overlay thickness,the method from the Specification of Design on Cement Concrete Pavement for Military Airfield was adopted to calculate the overlay thickness for analysis.The results show that the coupling coefficient between the new and old cement concrete pavement has obvious effect on overlay thickness,especially when coupling coefficient rises from 0to 0.2,the overlay thickness decreases from 17.98%to 47.54%.The overlay thickness rises with the increase of the pavement overlay size.Increasing the pavement overlay flexural strength can reduce the thickness of separated double-layer pavement overlay,while increasing the old concrete pavement flexural strength can obviously decrease the thickness of the combined double-layer pavement overlay.Therefore,more attention should be paid to the calculation parameters during airport pavement overlay design and construction.2tabs,6figs,13refs.