Abstract:  To analyze the reinforcement effect of doublerow round piles on a tunnel obliquely crossing landslide mass under seismic action, the landslide mass deformation is investigated using an indoor vibration platform. Furthermore, the dynamic response of the pile and tunnel structure is analyzed as well as the correlation analysis between the vibration response parameters of the pile and tunnel. The following conclusions are drawn: (1) Under the constraint of antislide piles, the landslide mass partially slides and fails on the sliding surface, and the actual sliding surface gradually develops from the surface of the landslide mass to the deep layer of the landslide mass. (2) The landslide surface primarily undergoes severe damage along the direction of antislide piles, which may be caused by stress propagation along the pile group. The double-row round piles arranged in a quincunx shape have a strong retention effect, ensuring landslide mass integrity to a certain extent. (3) The antislide pile has an inhibitory influence on the acceleration amplification effect. (4) The rear antislide piles bear the majority of the landslide thrust, which originates predominantly in the deep landslide mass. (5) The peak acceleration collected by the sensor nearly increases with the distance from the vibration platform, and there is a substantial correlation between the tunnel and the antislide piles.

Key words: round antislide pile, vibration platform, seismic model test, tunnel, landslide, dynamic response