城市轨道交通引起的地面环境振动影响预测研究  

Research on prediction of ground environmental vibration caused by urban rail transit

作　　者：周立波 Zhou Libo(Luoyang Rail Transit Group Co.,Ltd.,Luoyang Henan 471011,China)

机构地区：[1]洛阳市轨道交通集团有限责任公司,河南洛阳471011

出　　处：《山西建筑》2024年第18期125-127,177,共4页Shanxi Architecture

摘　　要：城市轨道交通已成为疏解交通拥堵的重要手段,然而列车运行过程中引起的地面环境振动会对沿线居民的工作生活带来一定影响。为研究洛阳地铁沿线某区间地面振动的分布规律,采用数值模拟方法对其地面振动进行研究,计算结果与文献测试数据基本一致。结果表明:地铁运行引起的振动经过“隧道壁-地面”显著降低,地表振动在距离轨道线路多处位置存在多个局部峰值,且峰值的间隔呈现出一定的规律性,其中距离14 m处的地面加速度出现振动放大现象。同时,结合环评导则中的公式预测结果进行对比分析,表明环评导则预测结果变化较为平缓,距隧道中心线20 m范围内计算结果小于仿真计算值。研究结果可为城市轨道交通引起的地面环境振动预测评估提供参考。Urban rail transit has become an important means to relieve traffic congestion.However,the ground environmental vibration caused by train operation will have a certain impact on the work and life of residents along the line.In order to study the distribution law of ground vibration in a section along Luoyang subway,the numerical simulation method is used to study the ground vibration.The calculation results are basically consistent with the test data in the literature.The results show that the vibration caused by subway operation is significantly reduced through the tunnel wall-ground.There are multiple local peaks of surface vibration at multiple locations from the track line,and the interval of peaks shows a certain regularity.The ground acceleration at a distance of 14m appears to be amplified.At the same time,combined with formula prediction results in the environmental impact assessment(EIA)guidelines,the comparative analysis shows that the prediction results of the EIA guidelines change more gently,and the predicted value is less than the simulated value within 20 m from track center line.The research results can provide reference for the prediction and evaluation of ground environmental vibration caused by urban rail transit.

关 键 词：轨道交通 地面振动 预测方法 数值模拟 

分 类 号：TU997[建筑科学—市政工程]