Abstract
Based on actual engineering geological conditions, foundation settlements and the effects of goaf’s positions on the settlements were measured to study the effects of underlying goaf on the road construction. Four transitional pavement structures with various base course were designed in goaf-affected areas. Under the soil consolidation settlement and traffic loading, the mechanical response of transitional pavement structures was simulated and analyzed. The critical safety zone of the goaf was obtained along the depth and the horizontal directions, respectively. The results indicate that the transitional pavement structure containing graded gravel base exhibited the minimum uneven settlement and pavement inclination under the condition of soil consolidation settlement. under traffic loading, the minimum tensile stress existed at the bottom of graded gravel base compared with that of the other three transitional pavement structures. Therefore, the flexible pavement with graded gravel base course is proposed as the transition pavement the mined-out areas.
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