Research on dynamic response characteristics of multi-anchor circular anti-slide pile under earthquake
To explore the dynamic response characteristics of multi-anchor circular anti-slide piles(hereinafter referred to as multi-anchor circular piles)to reinforce landslide,this study carried out shaking table tests with a generalized geological model as a case,and obtained multi-attribute data such as acceleration and dynamic earth pressure of multi-anchor circular piles,under the action of different seismic intensities.The macroscopic catastrophic evolution process of the slope and the regional response characteristics of the acceleration are elucidated.Recommendations are put forward for the practical application of multi-anchor circular piles in high intensity areas based on the force response data of pile and anchor cable structures.The results show that there are significant differences in the catastrophic mechanical mechanism and acceleration response of different parts of the slope under the influence of the coupling and mutual feedback effect of seismic force,sliding surface and pile reaction force.Under the earthquake action of more than 0.2 g,the acceleration amplification factor(MPGA)of the pile decreases with the increase of seismic intensity,and the anchor cable structure greatly reduces the risk of toppling or breaking of the anti-slide pile.In practical engineering,the anchor cable structure should adopt the progressive compensation design principle,and the reasonable distribution of the resistance of the pile anchor structure can give full play to its reinforcement performance.
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