설계하중 및 통과톤수를 고려한 유도상 아스팔트 궤도의 내구수명 예측

초록

Reducing the thickness of reinforced roadbed is possible for ballasted asphalt track, due to the train-load distribution effect of asphalt concrete layer constructed on the top of reinforced roadbed. Including the advantages against mud pumping and heaving, the ballasted asphalt track also have the great merits in preventing the strength reduction of roadbed and its softening by prohibiting raindrop penetration. The virtues have made its widespread adoption in many countries in Europe as well as the USA and Japan. Research on introducing the ballasted asphalt track is on-going presently in Korea to put it into practice. This paper, as a basic research to evaluate the applicability of the ballasted asphalt track, examined the possibility of reducing the thickness of reinforced roadbed under the asphalt concrete layer and its design life, with main variables being accumulated passing tonnage.