为探究地震作用下含隧道滑坡体的破坏模式，以正交下穿滑体主滑方向为例进行振动台试验，通过测试得到滑坡体内不同位置的加速度时程曲线，基于希尔伯特边际谱理论，获取不同位置测点的边际谱，并提取各测点边际谱峰值和特征频率，揭示隧道正交下穿滑体滑坡的破坏模式。结果表明： 〖ＪＰ２〗1）在不同强度地震作用下，基岩内地震能量有序传递,并不出现地震损伤，滑坡体内中上部坡体和下部坡体率先出现地震能量不能完整传递，出现地震损伤。2）隧道的存在劣化了上部坡体的力学环境，使得中下部坡体内隧道顶部T16测点在低能量输入下仍出现破坏。3）隧道正交下穿滑体主滑方向的震动破坏模式表现为崩落—拉裂—滑移破坏。

To investigate the failure mode of tunnel crossing landslide body under earthquake action, a vibration platform test is conducted to obtain the acceleration time history curves of different positions in landslide body. Based on Hilbert′s marginal spectrum theory, the marginal spectrum of measuring points at different locations is obtained, and the peak value and characteristic frequency of each measuring point are extracted to reveal the failure mode of tunnel orthogonally crossing slide body. The results show the following: (1) When earthquakes occur at all levels, the orderly transfer of seismic energy in the bedrock does not cause seismic damage, while the incomplete transfer of seismic energy occurs first in the middle, upper, and lower slopes of the landslide. (2) The existence of the tunnel degrades the mechanical environment of the upper slope, resulting in the failure of the T16 measuring point at the top of the tunnel in the middle and lower slope under low energy input. (3) The vibration failure mode of the main sliding direction of the tunnel crossing slide body is collapsetesionslide failure.