水平排桩对土体振动抑制作用影响的试验研究

为研究水平放置排桩对土体振动幅值的抑制作用，采用控制变量法进行模型试验，将试验获得的时域信号通过傅里叶变换转换为频域信号，得到频域条件下土体振幅，并绘制土体振幅等值线图，对等值线图不同区域土体振幅进行分析，重点分析振幅显著位置处数值变化。研究结果表明，排桩布置区域上方土体振幅大于排桩布置区域外的土体振幅，沿桩长方向土体振幅大于垂直于桩方向土体振幅；在排桩布置区域上方，排桩对高频波引起的土体振动抑制作用较差，对低频波引起的土体振动抑制作用较明显；排桩埋深越小，对土体振动的抑制作用越明显；排桩布置区域填充率越大，对土体振动的抑制作用越明显；排桩桩径越大，对土体振动的抑制作用越明显。

Source on Soil Vibration Experimental Study on the Suppression Effect of Horizontal Row Piles on Soil Vibration Frequency

For the study of horizontal soil pile on the vibration amplitude of the inhibition, the control variable method is adopted for model test. The time domain signal resulted from the test can be converted into frequency domain signal through Fourier transform, and the soil amplitude under the frequency domain was derived, and the amplitude contour map was drawn. The isoline map amplitude was analyzed, especially for different regions of key prominently in the numerical analysis of amplitude change. The results show that the soil amplitude above the pile row area is larger than that outside the pile row area, and the soil amplitude along the pile length is larger than that perpendicular to the pile. Above the pile row area, the soil vibration induced by high frequency wave is suppressed poorly, but the soil vibration induced by low frequency wave is suppressed obviously. The smaller the pile row depth is, the more obvious the soil vibration inhibition is. The larger the filling rate is, the more obvious the inhibition of soil vibration is. The larger the pile diameter, the more obvious the soil vibration inhibition.