高速铁路桩板结构对瑞利波的被动隔震试验研究

为研究高速铁路桩板结构被动隔震效果，以减震率作为隔震性能评价指标。通过模型试验分析不同几何参数的桩板结构隔震性能，并绘制减震率等值线图以描述其隔震区域。基于试验得到以下结论：桩板结构可以有效阻隔瑞利波，增加桩长、桩径和承载板厚度，并减小埋深与桩间距，可以提高隔震性能并增大有效隔震面积。减震率增长幅度随桩长、桩径和承载板厚度增大而减小，故桩径和桩间距参数宜控制在0.33至0.67之间，桩长参数宜控制在0.40至0.80之间，且应尽可能减小埋深。当砼使用方量相同时，隔震效果从强到弱依次为：桩长、承载板厚度和桩径。

Experimental research on passive vibration isolation of the pile-slab structure to Rayleigh wave in high speed railway

In order to study the passive vibration isolation effect of the pile-slab structure of high-speed railway, the seismic reduction rate is used as the evaluation index of vibration isolation performance. Through the model test, the vibration isolation performance of the pile-slab structure with different geometric parameters is compared and analyzed, and the isoline map of seismic reduction rate is drawn to describe its vibration isolation area. Based on the test, the following conclusions are obtained: the pile-plate structure can effectively block the Rayleigh wave. Increasing the pile length, pile diameter and bearing slab thickness, and reducing the buried depth and pile spacing can improve the vibration isolation performance and increase the effective vibration isolation area.The increase range of seismic reduction rate decreases with the increase of pile length, pile diameter and bearing slab thickness, so the parameters of pile diameter and pile spacing should be controlled between 0.33 and 0.67, the parameters of pile length should be controlled between 0.40 and 0.80, and the buried depth should be reduced as much as possible. When the concrete volume is the same, the isolation effect from strong to weak is: pile length, bearing slab thickness, pile diameter.