不同地质条件下地铁振动源强及影响实测与分析  

Measurement and Analysis of Vibration Source Strength and Influence of the Subway under Different Geological Conditions

作　　者：杨忠平 蒋忙舟[2] 张瑞浩 王冠柏 邵明耀 YANG Zhongping;JIANG Mangzhou;ZHANG Ruihao;WANG Guanbai;SHAO Mingyao(State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]陕西省铁道及地下交通工程重点实验室(中铁一院),西安710043 [2]中铁第一勘察设计院集团有限公司,西安710043 [3]西北工业大学航海学院,西安710072

出　　处：《铁道标准设计》2023年第9期190-194,共5页Railway Standard Design

基　　金：中铁第一勘察设计院集团有限公司科技研究开发计划项目(院科20-47)。

摘　　要：新版HJ 453—2018《环境影响评价技术导则城市轨道交通》已修订实施,对地铁振动源强确定方法和振动影响预测模式进行了改进。为掌握西安地铁的振动源强,提升振动环境影响评价的科学性,在已运营地铁线路不同地质条件的区间隧道和地面布设监测点位,得到振动源强和振动影响实测值,并进行分析和对比。结果表明:(1)地铁振动源强在不同地质条件下均呈现出极强的离散性,而地面振动影响则较为集中;(2)冲积、冲洪积平原区冲积地层的地铁振动源强比黄土塬区风积地层小约3.1 dB,时域和频域曲线各有不同;(3)黄土塬区地面振动影响垂向距离衰减明显,相比冲积、冲洪积平原,垂向距离衰减相差9.6 dB;(4)地面振动影响在冲积、冲洪积平原区1~1.5倍埋深距离处出现局部放大现象。冲积、冲洪积平原区地铁振动源强小,振动影响垂向距离衰减较弱。黄土塬区振动源强大,但振动影响垂向距离衰减明显。振动源强主频仍集中在63Hz附近,振动影响水平距离衰减区别不大。Technical Guidelines for Environmental Impact Assessment—Urban Rail Transit(HJ 453—2008)has been revised.The method for determining the vibration source strength of the subway and the prediction model for vibration influence have been improved.In order to grasp the vibration source strength of Xi􀆳an subway and improve the scientificity of vibration environmental impact assessment,monitoring points are arranged in the tunnels and on the ground under different geological conditions of the operating subway line.The measured values of vibration source strength and influence are obtained,analyzed and compared.The results indicate that the subway vibration source strength under different geological conditions shows strong discreteness,while the influence of ground vibration is more concentrated.The vibration source strength in alluvial strata of the alluvial-proluvial plain is about 3.1 dB lower than that in aeolian strata of the loess plateau,whose time and frequency domain curves are different.The vertical distance attenuation of ground vibration in the loess plateau is obvious,which is about 9.1 dB more than that in the alluvial-proluvial plain.The ground vibration is partially amplified at the distance of 1-1.5 times the buried depth of the subway tunnel in the alluvial-proluvial plain.The vibration source strength in the alluvial-proluvial plain is smaller than that in the loess plateau.The vertical distance attenuation of ground vibration in the loess plateau is more stronger than that in the alluvial-proluvial plain.While the main frequency of the vibration source strength is still concentrated around 63 Hz and the horizontal distance attenuation of ground vibration is of a little difference.

关 键 词：地铁 振动源强 振动加速度 振动影响 测试 

分 类 号：U231[交通运输工程—道路与铁道工程] X83[环境科学与工程—环境工程]