旧水泥混凝土路面共振破碎振动影响范围研究
作者:
作者单位:

(1. 长沙理工大学 交通运输工程学院,湖南 长沙,410114;2. 中铁五局集团有限公司,湖南 长沙,410100;3. 佛山市建盈发展有限公司,广东 佛山,528099)

作者简介:

通讯作者:

查旭东(1970—),男,长沙理工大学教授,博士生导师。

中图分类号:

U418.8

基金项目:

国家自然科学基金资助项目(51878077);中铁五局集团有限公司科技项目(2020[12]);佛山市建盈发展有限公司科技项目(FS-XTNH-G-[2018]011)


Study on the influence range of vibration induced by resonant rubblization in existing cement concrete pavement
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Affiliation:

(1. School of Traffic and Transportation Engineering,Changsha University of Science & Technology,Changsha 410114,China;2. China Railway No.5 Engineering Group Co.,Ltd.,Changsha 410100,China;3. Foshan Jianying Development Co.,Ltd.,Foshan 528099,China)

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    摘要:

    旧水泥混凝土路面共振碎石化施工中的振动会影响邻近结构物的服役安全,为分析其振动传播特性及安全控制范围,针对某实际工程进行现场共振破碎振动试验,采集不同测线和不同测点处的振动加速度和振动速度的时程数据,并应用快速傅里叶变换对相应的振动响应进行频谱分析,建立振动峰值沿地表横向和地层竖向传播的衰减模型。研究结果表明:共振破碎振动具有频率高、振幅低的特点,其振动主频为46~50 Hz;振动峰值随横向距离增大呈指数衰减,随竖向深度增大呈反S形曲线衰减;根据建筑物振动安全控制标准,提出了共振破碎振动对邻近结构物影响的地表横向安全距离和地层竖向安全深度分别不小于6.1 m和1.3 m的结论,该研究可为旧水泥混凝土路面共振碎石化施工的安全范围控制提供参考。

    Abstract:

    During construction process of resonance rubblization in existing cement concrete pavement, the induced vibration will affect the service safety of adjacent structures. In order to analyze the vibration propagation characteristics and the safety control range, the field resonant rubblization test was carried out. The time-history curves of vibration acceleration and vibration velocity at different measuring lines and different measuring points were collected. The spectrum analysis of vibration signal was performed by the Fast Fourier Transform, and the attenuation models of vibration peak propagating along the transverse surface and vertical stratum were established. The results show that the vibration induced by the resonant rubblization is characterised by high frequency and low amplitude, and the dominant frequency of vibration is 46~50 Hz. The vibration peak decreases exponentially with the increase of the transverse distance, which decreases in an inversely S-shaped curve with the increase of the vertical depth. According to the vibration safety control standard for buildings, it is proposed that the minimum safe distance of transverse surface and the minimum safe depth of vertical stratum from the adjacent structures are 6.1 m and 1.3 m respectively, which can provide reference for the control of safe influence range of vibration induced by resonant rubblization in existing cement concrete pavement.

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查旭东,钟海阔,吕茂丰,等.旧水泥混凝土路面共振破碎振动影响范围研究[J].交通科学与工程,2023,39(4):1-8.
ZHA Xudong, ZHONG Haikuo, LYU Maofeng, et al. Study on the influence range of vibration induced by resonant rubblization in existing cement concrete pavement[J]. Journal of Transport Science and Engineering,2023,39(4):1-8.

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  • 收稿日期:2023-04-10
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  • 在线发布日期: 2023-09-25
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