The aim of this paper is to study the soil vibration response of a pile group induced by train traffic resting on the inclined bedrock condition. A series of model tests on the response of peak velocity were conducted in terms of inclined bedrock, loading frequency and short/long piles. The experimental results show that the peak velocity increased from the upslope to the downslope direction along the soil surface affected by the bedrock. The peak velocity increased with the increasing of loading frequency. In addition, as the loading frequency and horizontal distance increased, the difference of peak velocity along the circular direction in the soil surface would be more significant. The combined effects of long and short piles would induce a large difference of peak velocity on the pile side. However, the peak velocity on the concrete slab would not be affected. Furthermore, the peak velocity at the central point of the pile group was nearly the same to that on the side of the long pile and two times larger than that on the side of the short pile, which indicates the superposition of vibration wave of the pile group.

本文旨在研究倾斜基岩条件下列车通行引起的群桩的土壤振动响应。针对倾斜基岩，荷载频率和短/长桩进行了一系列的峰值速度响应模型测试。实验结果表明，沿基岩作用的土壤表面，峰值速度从上坡向下坡方向增加。峰值速度随着加载频率的增加而增加。此外，随着加载频率和水平距离的增加，土壤表面沿圆周方向的峰值速度之差将更加显着。长桩和短桩的共同作用会引起桩侧的峰值速度差异很大。然而，不会影响混凝土板上的峰值速度。此外，桩群中心点的峰值速度与长桩侧的峰值速度几乎相同，比短桩侧的峰值速度大两倍，这表明桩的振动波是叠加的组。