Research of wave propagation and vibration reduction generated by urban traffic

城市交通产生的波传播与减振研究

• 批准号: 14350253
• 负责人: KUSKABE Osamu
• 金额: $ 5.25万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350253/
• 关键词: Centrifuge model test; Vibration by urban traffic; vibration reduction method; 地盤振動

The purpose of this study is to investigate the properties of wave propagation from urban traffic and develop the reasonable vibration countermeasure. For that purpose, multiple ball-dropping system and vibration testing system, which can simulate the shock wave and regular vibration in the centrifugal acceleration, were made. Some test series were conducted by using these systems in order to develop the countermeasure for vibration in urban area in 2002.Recently, it is increasing to construct buildings or infrastructure near subway tunnel. In this case, The problem which we have to consider is not only deformation of surrounded ground but also vibration from subway. Therefore, it is necessary to predict the wave propagation mechanism and make effective countermeasure. There are some datum measured in-situ about the wave propagation to ground surface from tunnel. But it is difficult to clarify the mechanism of wave propagation from in-situ datum because ground properties and boundary conditions were very complex. In order to investigate the mechanism of wage propagation from subway tunnel, the centrifugal model of wave propagation from subway were developed in 2003 and some tests were conducted on simple boundary conditions in 2004.In the centrifuge tests, the small oscillator was set in the model shield tunnel, which was made of acryl cylinder and vibration was applied to the tunnel at the centrifugal acceleration of 62.5G. Frequency of vibration was in the range between 10Hz and 70Hz in prototype scale.As a result, following conclusions were obtained.1.Vibration was propagated from bottom area of tunnel.2.Vibration with low frequency, whose frequency was in the range between 10Hz and 20Hz, propagated easily to the ground surface.

这项研究的目的是研究城市交通中波传播的特性，并发展合理的振动对策。为此，可以在离心机加速器中模拟冲击波和常规振动的多个球滚系统和振动测试系统。通过使用这些系统进行了一些测试系列，以开发2002年在市区的振动的对策。实际上，在地铁隧道附近建造建筑物或基础设施正在增加。在这种情况下，我们必须考虑的问题不仅是周围地面的变形，而且是地铁的振动。因此，有必要预测波传播机制并进行有效的对策。关于从隧道到地面的波传播到地面的基准，有一些基准。但是，由于地面性质和边界条件非常复杂，因此很难阐明从原位基准的波传播机理。为了研究地铁隧道的工资传播机制，2003年开发了从地铁的波传播的离心模型，并在2004年对简单边界条件进行了一些测试。在离心机测试中，在模型中设置了小振荡器。盾形隧道是由丙烯缸制成的，并在62.5g的离心机加速度以振动施加到隧道上。振动的频率在原型尺度的10Hz和70Hz之间。结果，在得出结论之后。1。振动从隧道的底部传播。2。振动频率低，其频率在10Hz之间的范围为10Hz。和20Hz，很容易传播到地面。

项目成果

煉瓦積みトンネルの覆工模型載荷実験

砖砌隧道衬砌模型加载试验

• 发表时间: 2004
• 期刊: 土木学会年次学術講演会講演概要集第3部 Vol.59
• 作者: 岡野法之;小島芳之;津野究;朝倉俊弘
• 通讯作者: 朝倉俊弘

遠心載荷装置を用いた地下鉄振動の模型実験方法の開発

离心加载装置地铁振动模型试验方法开发

• 发表时间: 2004
• 期刊: 第39回地盤工学研究発表会講演集
• 作者: 森本亘;津野究;村田修;伊藤和也;日下部治
• 通讯作者: 日下部治

K.ITOH, M.KODA, A.TAKAHASHI, O.MURATA, O.KUSAKABE: "Centrifugal Simulations of Vertical Vibration of Shallow Foundation on Sand"The BGA International Conference on Foundations (ICOF2003). 381-390 (2003)

K.ITOH、M.KODA、A.TAKAHASHI、O.MURATA、O.KUSAKABE：“沙上浅基础垂直振动的离心模拟”BGA 国际基础会议（ICOF2003）。

村田修, 伊藤和也, 神田政幸, 日下部治, 棚村史郎: "振動遮断工の防振効果に関するパラメータースタディー"鉄道総研報告. 第15巻第10号. 39-44 (2001)

Osamu Murata、Kazuya Ito、Masayuki Kanda、Osamu Kusakabe、Shiro Tanamura：“隔振器隔振效果的参数研究”铁道研究所报告第 15 卷第 10 期。39-44 (2001)。

Itoh, K., Koda.M., Lee, K.I., Murata.O., Kusakabe, O.: "Centrifugal Simulations of Wave Propagation using a Multiple Ball Dropping System"International Journal of Physical Modelling in Geotechnics. Volume 2 No.2. 33-51 (2002)

Itoh, K.、Koda.M.、Lee, K.I.、Murata.O.、Kusakabe, O.：“使用多球落下系统进行波传播的离心模拟”国际岩土工程物理建模杂志。