首页|高速铁路路堤对环境振动的影响研究

高速铁路路堤对环境振动的影响研究

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  • 国家科技期刊平台
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为研究高速铁路路堤填高、坡率对环境振动的影响，在京张高速铁路路基段附近开展现场实测，研究其环境振动的传播衰减规律。基于现场实测结果利用FLAC3D建立数值仿真模型，数值分析结果与实测值吻合良好，验证模型的合理性，并进行路堤填高、坡率对环境振动影响的分析。结果表明:现场实测振级幅值均小于63 dB，整体而言测点振级随着测点与线路外轨距离的增加逐渐减小;当路堤高度为1m时，相对于路堤高度为0m测点在距铁路线距离60m范围以内振级出现反弹放大的现象;当路堤高度大于2m时，相对于路堤高度为0m对环境振动的影响大;因此，建议路堤高度在设定时不小于2m;当边坡直立时地表振动最小;当坡率大于0时，相对于边坡直立时对环境振动的影响大;因此，建议采用U型槽结构路堤，其对环境振动的影响较小。
Influence of High-speed Railway Embankment Profile on Environmental Vibration
In order to study the influence of filling height and slope ratio of the high-speed railway embankment on environmental vibration,the field test was carried out near the subgrade of Beijing-Zhangjiakou high-speed railway,and the propagation attenuation law of environmental vibration was studied.Based on the field test results,the numerical simulation model was established by FLAC3D.The numerical analysis results were in good agreement with the field test results,which verifies the rationality of the numerical simulation model.Furthermore,the influence of filling height and slope ratio of the embankment on environmental vibration was analyzed.The results show that the field test vibration level magnitudes are less than 63 dB.Generally speaking,the vibration level of the measuring point decreases gradually with the increase of the distance between the measuring point and the outer rail of the line.When the embankment height is 1 m,compared with the embankment height of 0 m,the vibration level of the measuring point within 60 m from the railway line appears rebound amplification phenomenon.When the embankment height is greater than 2 m,compared with the embankment height of 0 m,the influence of environmental vibration is greater.So,it is suggested that the embankment height should be higher than 2 m.When the slope is upright,the surface vibration is minimum;When the slope ratio is greater than 0,compared with the slope of upright,the influence of environmental vibration is greater.Therefore,it is suggested that the U-shaped groove structure embankment should be used,which has little influence on environmental vibration.

environmental vibrationhigh-speed railwayembankmentfield testnumerical analysis

陈洪运、王海洋、刘乾坤、董捷、胡建林、周小龙

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河北建筑工程学院 土木工程学院,河北 张家口 075000

河北建筑工程学院 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

环境振动 高速铁路 路堤 现场实测 数值分析

河北建筑工程学院博士科研启动基金河北省省属高等学校基本科研业务费研究项目河北省省属高等学校基本科研业务费研究项目河北省省属高等学校基本科研业务费研究项目河北省自然科学基金面上项目河北建筑工程学院研究生创新基金河北省住建厅建设科技研究项目

B-2021012021QNJS072021QNJS022022QNJS06E2020404007XY20230432022-2106

2024

10.3969/j.issn.1006-1355.2024.02.035

噪声与振动控制
中国声学学会

噪声与振动控制

CSTPCD北大核心
影响因子：0.622
ISSN：1006-1355
年,卷(期)：2024.44(2)
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