摘要
对于地铁车辆段上盖建筑的结构形式不同于传统地面建筑所导致的链式预测模式的适用性和准确度降低的问题,以车辆段试车线区域上盖建筑为研究对象,根据上盖建筑振动主要传递路径和结构特点,将预测模型中盖板结构振动衰减修正细分为盖下结构柱1.25 m位置的振动源强、源强点至盖板上距离线路水平距离7.5 m位置的高度修正项和沿盖板水平方向的振动衰减修正项。通过在线测试获取车辆段试车线多个断面结构柱及盖板处振动响应数据,采用实测数据拟合的方法,得到预测模型中沿盖板高度和长度方向的振动衰减修正项表达式。最后,将所构建的预测模型用于预测另一车辆段上盖建筑,同时采用标准中推荐的链式预测模型进行预测分析。通过将两种预测模型的预测结果与实测值的对比,验证了该预测模型的有效性。该研究成果可为制定车辆段上盖建筑振动预测标准提供参考。
The problem of low applicability and accuracy of the chain prediction model due to the difference of the structural form of the buildings above the metro depot from traditional ground buildings was studied.The buildings above the test line of the metro depot were taken as the research object.Based on the main transmission path of the vibration in the over-track building and its structural characteristics,the vibration attenuation correction of the cover plate structure in the prediction model was subdivided into the vibration source intensity at the position of 1.25 m of the structural column below the cover plate,the height correction term from the source intensity point to the position 7.5 m horizontally away from the line on the cover plate and the vibration attenuation correction term along the horizontal direction of the cover plate.Vibration response data at multiple structural sections,including columns and cover slabs within the depot,was obtained through online testing.A vibration attenuation prediction model was developed,and the attenuation correction terms along the height and length directions of the cover slab were calibrated using a fitting method based on the measured data.Finally,the prediction model constructed in this article was applied to predict the vibration response of the building above another metro depot,and the chain prediction model recommended in the standard was used for prediction analysis.The effectiveness of the prediction model was verified by comparing the predicted results of the two prediction models with the measured values.The findings provide a valuable reference for the establishment of vibration prediction standards for over-track buildings above metro depots.
作者
岳思
仇昕昕
鞠龙华
李南锟
刘金涛
刘冰雨
YUE Si;CHOU Xinxin;JU Longhua;LI Nankun;LIU Jintao;LIU Bingyu(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Environmental Engineering Assessment Center of State Ministry of Ecology and Environment,Beijing 100012,China;School of Urban Rail Transportation,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《噪声与振动控制》
北大核心
2025年第5期240-246,共7页
Noise and Vibration Control
基金
中铁第四勘察设计院集团有限公司科技开发课题资助项目(2020K126)。
关键词
环境振动
轨道交通
地铁车辆段
上盖建筑
预测方法
environmental vibration
rail transit
metro depot
over-track building
prediction method
