水平排桩对土体振动抑制作用影响的试验研究

刘晶磊; 吴浩; 杨烁; 张政; 李春雨; 魏宝川

doi:10.11899/zzfy20220117

水平排桩对土体振动抑制作用影响的试验研究

doi: 10.11899/zzfy20220117

刘晶磊^{1, 2, 3,},
吴浩^{1, 2, 3, ,},
杨烁^{1, 2, 3},
张政^{1, 2, 3},
李春雨^{1, 2, 3},
魏宝川^{1, 2, 3}

1.
河北省土木工程诊断、改造与抗灾重点实验室, 河北张家口 075000
2.
河北建筑工程学院, 河北张家口 075000
3.
河北省寒冷地区交通基础设施工程技术创新中心, 河北张家口 075000

基金项目: 2022年度河北省高等学校科学研究重点项目（ZD2022017）；河北省科技厅重点研发计划（20373802D）；河北建筑工程学院研究生创新基金（XY202104）

详细信息

作者简介:
刘晶磊，男，生于1981年。副教授。主要从事土体动力特性、铁路路基研究。E-mail： kingbest_1118@163.com

通讯作者:
吴浩，男，生于1998年。硕士。主要从事路基抗振研究。E-mail：wuhao1998@yeah.net

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出版历程
- 收稿日期: 2021-09-06
- 网络出版日期: 2022-05-31
- 刊出日期: 2022-03-31

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

Liu Jinglei^{1, 2, 3
,},
Wu Hao^{1, 2, 3
, ,},
Yang Shuo^{1, 2, 3},
Zhang Zheng^{1, 2, 3},
Li Chunyu^{1, 2, 3},
Wei Baochuan^{1, 2, 3}

1.
Hebei Key Laboratory of Diagnosis, Reconstruction and Anti-disaster of Civil Engineering, Zhangjiakou 075000, Hebei, China
2.
Hebei University of Architecture, Zhangjiakou 075000, Hebei, China
3.
Hebei Innovation Center of Transportation Infrastructure in Cold Region, Zhangjiakou 075000, Hebei, China

摘要

摘要: 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。
- 振动频率 /
- 振动幅值 /
- 傅里叶变换 /
- 排桩 /
- 模型试验
Abstract: 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.
- Vibration frequency /
- Vibration amplitude /
- Fourier transform /
- Horizontal row of piles /
- Model test

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图 1 现场试验设备

Figure 1. Field test equipment

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图 2 试验场地布置

Figure 2. Layout of the test site

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图 3 检测线示意图

Figure 3. Inspection line diagram

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图 4 加速度变化曲线

Figure 4. Acceleration time history curve

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图 5 振动波与水平排桩的相互作用

Figure 5. Interaction between vibration wave and horizontal row of piles

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图 6 频谱图

Figure 6. Schematic diagram of data spectrum

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图 7 不同振源频率下土体振幅等值线图

Figure 7. Contour map of soil amplitude at different vibration source frequencies

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图 8 不同排桩埋深下土体振幅等值线图

Figure 8. Contour map of soil amplitude under different pile row buried depths

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图 9 不同填充率下土体振幅等值线图

Figure 9. Contour map of soil amplitude at different filling rates

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图 10 不同桩径下土体振幅等值线图

Figure 10. Contour map of soil amplitude under different pile diameters

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表 1 试验工况

Table 1. Test condition lists

工况	埋深w/cm	振源频率f/Hz	填充率m/%	桩径d/cm
工况1	15	10	66.7	10
工况2	15	60	66.7	10
工况3	15	150	66.7	10
工况4	5	60	66.7	10
工况5	20	60	66.7	10
工况6	15	60	50.0	10
工况7	15	60	83.3	10
工况8	15	60	66.7	5
工况9	15	60	66.7	15

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