中文摘要：

衡量城市轨道交通引起的环境振动水平的指标是最大Z振级和分频最大振级。目前，关于评价指标的计算存在着诸多混淆，影响了评价指标的计算、评价结果，甚至进一步影响线路的规划及设计。通过详细计算重叠系数及计权因子对最大Z振级计算结果的影响，发现当重叠系数达到3／4时，最大Z振级计算结果基本稳定；采用1SO2631－1：1997中的频率计权曲线更能综合考虑轨道交通引起的环境振动对人体健康、舒适性及工作效率的影响，建议修订《城市区域环境振动标准》（GB10070-88）时采用此频率计权曲线。针对分频最大振级计算方法中的混淆问题，计算并分析线性平均、峰值保持等方法对计算结果的影响，为保证评价结果的可靠性，建议采用峰值保持法进行计算和评价。

英文摘要：

Indicators to evaluate environmental vibration induced by urban rail transit are VLzmax and VLmax. Nowadays, the confusing calculating methods of the evaluation indicators have affected the planning and design of subway lines. The influences of overlapping coefficient and frequency weighting curve on VLzmax are researched in this paper. The study found that the result of VLzmax is basically stable when the overlapping coefficient is 3/4. Frequency weighting curve in ISO 2631 - 1：1997 is recommended for the amendments to the GB 10070-88 Standard of Environmental Vibration in Urban Area because the curve considers the effect of rail transit vibration on human health, comfort and productivity. Calculating methods of linear averaging, peak hold, max RMS hold have significant influences on the VLmax result, which could affect the evaluating result. To ensure the reliability of the evaluation results, peak hold method should be adopted as the calculating method.