CAJ | 학술논문

聚氨酯固化道床是介于传统碎石道床和无砟轨道整体道床之间的一种新型结构。本文介绍了聚氨酯固化道床的国内外现状；通过聚氨酯固化道床围压试件的疲劳荷载、冻融试验、实尺模型疲劳试验和现场加载车测试试验，研究聚氨酯固化道床的弹性、抗累积变形、荷载传递规律及轨排阻力等力学性能。试验结果表明：聚氨酯固化道床具有良好弹性保持能力和抗累积变形能力，和普通碎石道床相比，具有更好的抵抗横向荷载能力，同时验证了聚氨酯固化道床结构设计断面的合理性。
취안지고화도상시개우전통쇄석도상화무사궤도정체도상지간적일충신형결구。본문개소료취안지고화도상적국내외현상；통과취안지고화도상위압시건적피로하재、동융시험、실척모형피로시험화현장가재차측시시험，연구취안지고화도상적탄성、항루적변형、하재전체규률급궤배조력등역학성능。시험결과표명：취안지고화도상구유량호탄성보지능력화항루적변형능력，화보통쇄석도상상비，구유경호적저항횡향하재능력，동시험증료취안지고화도상결구설계단면적합이성。
T he polyurethane solidified ballast bed is the compromise between tradition ballasted track bed and monolithic track bed of ballastless track. In this paper,the domestic and international current research of polyurethane solidified ballast bed was introduced,and the mechanical properties including elasticity,anti-accumulative deformation,load transfer law and rail resistance were studied through the experiments of confining pressure test piece,such as fatigue load,freezing and thawing,full scale model of fatigue and field loading vehicle. T he test results showed that polyurethane solidified ballast bed has good elastic maintenance ability and anti accumulative deformation ability,this type of track bed has better capacity to resist lateral load compared to tradition ballasted track bed,the rationality of section design for polyurethane solidified ballast bed structure is verified.