为探讨高速铁路隧道衬砌结构在列车振动荷载长期作用下的动力累积损伤特征，阐述混凝土结构动力相似材料模型试验原理，以武广高速铁路金沙洲隧道为原型，利用微粒混凝土作为相似材料，构建隧道与围岩动力相互作用全断面试验模型，施加高速列车振动荷载对相似材料模型进行动力累积损伤试验； 试验过程中同步测试隧道衬砌结构各特征点动应变、超声波速度以及隧道底部围岩接触应力的时程响应数据，分析隧道衬砌结构动力响应特征与累积损伤规律。得出了在设计使用寿命期内，高速列车振动荷载长期作用下，隧道衬砌结构动力累积损伤效应不明显，而隧道底部围岩累积损伤破坏则应引起足够重视等研究结论。

The characteristics of dynamic cumulative damage of lining structure of highspeed railway tunnel under the longterm vibration load of train and the dynamic similar material model test for concrete structure should be well known. A fullface tunnel test model for the dynamic interaction between Jinshazhou Tunnel on WuhanGuangzhou Highspeed Railway and surrounding rocks is established by using microconcrete as similar material; and then the vibration load of highspeed train is brought to bear on the model to carry out dynamic cumulative damage test; meanwhile, the characteristics of dynamic response and the cumulative damage law of tunnel lining structure are analyzed by collected data of dynamic strain of tunnel lining structure, velocity of ultrasonic and contact stress of surrounding rock under tunnel during test. The results show that under the longterm action of vibration load of highspeed train, the dynamic cumulative damage of tunnel lining structure is not obvious while that of surrounding rock under tunnel is obvious. 