中文摘要：

哈大高速铁路的冬季运营经验表明,严寒地区高速铁路路基冻胀问题比较普遍。路基冻胀引起的轨道静、动态不平顺影响高速列车运行平稳性,有必要制定高速铁路路基冻胀控制标准。本文应用有限元方法建立车辆-轨道-路基冻胀分析模型,分析路基冻胀作用下CRTSⅢ型板式无砟轨道变形规律及车辆-轨道结构的动力响应特征。计算结果表明：冻胀主要影响列车垂向动力学性能;随着冻胀量的增加,车辆运营平稳性明显下降,其中波长较短冻胀的影响更剧烈;当冻胀达到10m波长、15mm冻胀量时,底座板动态拉应力超出其抗拉强度。基于动力学分析结果绘制冻胀控制标准临界曲线,对路基不均匀冻胀进行划分。

英文摘要：

The winter operation experience of Harbin-Dalian High-speed Railway shows that the frost heaving ofhigh-speed railway subgrade in cold region is common. As the static and dynamic track irregularity caused by the subgrade frost heaving affects the stable operation of the high speed trains, it is urgent to establish stan-dard for frost heaving control of subgrade of high speed railway. Based on FEM, a dynamic model of vehicle- track-subgrade frost heaving was built to analyze the deformation law of CRTS HI type slab track and dynamic response of vehicle-track system under frost heave action combined. Results indicate that the subgrade frost heaving mainly affects the vertical dynamic performance of the train. With the increase of frost heave, the ve-hicle running stability decreased obviously. The effect of the frost heave is more severe when the wavelength is shorter. For the frost heave with 10 m wavelength and 15 mm amount of frost heaving, the dynamic tensile stress of the base plate exceeds its tensile strength. Combining with the results of dynamic analysis, different critical curves of the frost heaving controlling standard were drawn to give a division standard of subgrade une-ven frost heaving development.