Polyurethane-reinforced ballasted track (PRBT) can improve the integrity of ballasted track structures and satisfy the high-stability requirements of high-speed railways. In this study, the quality evolution law of PRBT structures after being launched into train service was analyzed, and a reference for structural optimization and maintenance operation was provided. The track geometric state of the PRBT test section of a high-speed railway was measured and monitored for nearly one year after it was launched into operation, and the ballastless track of the adjacent section was selected as a reference. The geometric states of the tracks were evaluated and compared using various parameters, including sliding standard deviation, average standard deviation, and track irregularity spectrum density. Results show that the track quality indexes of the test section, which were in operation for nearly one year, were slightly over the limit. Moreover, the fastener can be finely adjusted for the high-value index sections to further improve the ride comfort. The application effect of PRBT in the subgrade fracture zone was good, which could satisfy the requirements of high-quality transportation as well as the normal operation and maintenance of high-speed railway.

聚氨酯增强道ast轨道（PRBT）可以提高道track轨道结构的完整性，并满足高速铁路的高稳定性要求。本研究分析了PRBT结构在列车上线后的质量演化规律，为结构优化和维修操作提供了参考。高速铁路PRBT试验路段投入运营后将近一年，对其轨道几何状态进行了测量和监测，并选择了相邻路段的无track轨道作为参考。使用各种参数（包括滑动标准偏差，平均标准偏差和轨道不规则频谱密度）评估和比较轨道的几何状态。结果表明，运行了将近一年的测试段的轨道质量指标略高于极限。此外，可以针对高价值指数部分对紧固件进行微调，以进一步提高乘坐舒适性。PRBT在路基断裂带上的应用效果良好，可以满足高质量运输以及高速铁路正常运行和维护的要求。