关键词: 悬臂抗滑桩, 堆积型滑坡, 离心模型试验, 土压力, 桩身弯矩, 加速度响应, 全过程分析

Abstract: Based on the static and dynamic centrifugal model test of cantilever anti-slide pile in accumulation landslide, the mechanical characteristics of anti-slide pile and the seismic responses of landslide were analyzed using data from soil-pressure sensors, strain gauge pairs of pile and accelerometers. The results show that the distribution laws of earth pressure on the back of piles and bending moment of pile under static loading and dynamic conditions were different. The static earth pressure of pile back was significantly greater than that induced by earthquake action, but the static bending moment of pile was far smaller than that caused by seismic vibration. The dynamic earth pressure on the back of piles and the bending moment of piles increased with the increase of peak ground motion. The action points of the maximum earth pressure on the back of piles and bending moment of pile were lower under seismic actions than under static condition. There is superficial amplification effect near the crest of landslide and elevation magnifying effect inside the landslide. The phenomenon of wave type transform was significant, to which more attention should be paid in aseismatic design.

Key words: cantilever anti-slide pile, accumulation landslide, centrifugal model test, earth pressure, bending moment of pile, acceleration response, analysis of full process