For the purpose of studying the specific effects of different forms of vibration damping tracks on the environment noise reduction of metro viaduct section, this paper takes the surrounding environment noise in viaduct section of a domestic metro line as the research object and tests are conducted to measure the level of environment noise induced by the metro vehicle running on the two different tracks of the viaduct section at the speed of 110 km/h. Then the original evaluation method is changed and the more audile loudness analysis method is introduced to conduct comprehensive assessment of the level of environment noise. Later, the noise levels of the two forms of tracks are compared and analyzed based on those assessment results and some new ideas are proposed. The results show that:(1)compared with DZⅢ-1 type ordinary fastener vibration damping track, GJ-Ⅲtype medium fastener vibration damping track has no evident effects on lowering the level of noise at all measuring points except for one under the central line of the viaduct;( 2 ) the loudness analysis reveals that the perception of human ears on the environmental noise may be intensified in presence of GJ-Ⅲ type medium fastener vibration damping track.%为了研究不同形式减振轨道对降低地铁线路高架段环境噪声效果,以国内某地铁高架桥段周边环境噪声为研究对象,分别对列车以110 km/h通过该高架段2种不同轨道时诱发的噪声水平进行测试分析,然后改变原有评价方式,通过引入更符合人耳听觉的响度分析方式对噪声水平进行综合评价,并对比分析两种轨道形式的噪声水平,提出改进思路.结果表明:(1)相比DZⅢ-1型普通减振扣件轨道,GJ-Ⅲ型中等减振扣件轨道除在桥中央线测点处有一定降噪效果外,在其他测点处降噪效果并不明显;(2)通过响度分析发现,GJ-Ⅲ型中等减振扣件可能还会增大人耳对环境噪声的感知情况.
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