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Resolution about Amplification Phenomena of Ground Vibration on Surface Soft Layer and Vibration Countermeasures

地表软层地面振动放大现象的解析及振动对策

基本信息

批准号：
14550501
负责人：
HAYAKAWA Kiyoshi
金额：
$ 2.24万
依托单位：
Ritsumeikan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550501/
关键词：
Ground Vibration Vibration Countermeasure Wave Barrier Site Investigation Model Test Simulation Analysis Wave Propagation Road and Railway Traffic 軟弱地盤伝播・増幅数値シミュレーション防振対策発泡スチロール鋼管列 PC壁体

项目摘要

Transmitted through soil, ground vibration originating in vehicles passing on a road and railway gives rise to adverse environmental hazards on the inhabitants in its neighborhood. This paper describes a study conducted at a site by plane-roads, elevated road and railway truck to send light to the mechanism by which vibration is transmitted through soil to bring about an adverse effect on a typical house standing by the road and railway. The data analyzed revealed that the ground vibration addressed was transmitted through the soil predominantly at a particular frequency close to the natural frequency of houses, giving rise to the adverse effect on it as a result resonance with such ground vibration.The simple method use in this survey to assess the surface evenness of a road in terms of the level of acceleration recorded with a suitable instrument set up on a running vehicle proved very helpful proving useful data with which to determine the length of the section to be overlaid on the … More road as well as the performance of the overlay.PC wall-pile barrier was addressed as a means for reducing ground vibration due to road traffics. Both field measurements and an FEM analysis of an elevated road were performed. Also, field model experiments and its simulation analyses are performed From this study, the following conclusions can be made. The PC wall-pile barrier was found to be capable of reducing both surface and underground vibration by about 5dB at a distance 25m away from the footing of the considered bridge. The results from the analysis suggested that the footing responded as a rigid body. The screening effect of the PC wall-pile barrier was quantitatively simulated by the three-dimensional finite element analysis.From the field tests and its simulation by using steel sheet-pile about reducing ground vibration transmitted from the railway, at point just behind barrier driven to 2m and 4.5m, vibration by about 6dB and 12dB, respectively from that recorded at the same point with no barrier. The analytical method used in this study was found to be capable of qualitatively reproducing the performance against vibration of a barrier built with steel-piles. Less

在公路和铁路上行驶的车辆产生的地面振动通过土壤传播，对其附近的居民产生不利的环境危害。本文介绍了在现场通过平面公路、高架公路和铁路卡车进行的研究，以揭示振动通过土壤传递对公路和铁路旁典型房屋产生不利影响的机理。分析的数据表明，所处理的地面振动主要以接近房屋固有频率的特定频率通过土壤传播，从而与这种地面振动产生共振，从而对土壤产生不利影响。本调查中使用的简单方法是根据在行驶的车辆上设置的合适仪器记录的加速度水平来评估道路的表面均匀度，这证明了非常有用的数据，可以确定在…More道路上覆盖的路段的长度以及覆盖的性能。探讨了PC墙桩屏障作为减少道路交通引起的地面振动的一种手段。对某高架公路进行了现场实测和有限元分析。并进行了现场模型试验和仿真分析，得出以下结论：研究发现，在距离桥梁基础25米的地方，PC墙-桩屏障能够将地面和地下的振动减少约5dB。分析结果表明，基础响应为刚体。通过三维有限元分析，定量模拟了PC墙-桩屏障的筛分效果。从现场试验和钢板桩模拟结果来看，在障碍物后2米和4.5米处，铁路传递的地面振动比无障碍物时同一点记录的振动分别减少了约6dB和12dB。本研究中使用的分析方法能够定性地再现钢桩屏障的抗振性能。少