高速公路林带声衰减量计算方法  被引量:5

Calculated Method of Noise Attenuation of Tree Belts at Expressway

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作  者:袁玲[1] 王选仓[2] 鲁亚义[3] 李子军[3] 

机构地区:[1]长安大学信息工程学院,陕西西安710064 [2]长安大学公路学院,陕西西安710064 [3]吉林省高等级公路建设局,吉林长春130216

出  处:《中国公路学报》2009年第3期107-112,共6页China Journal of Highway and Transport

基  金:国家西部交通建设科技项目(200531881313);吉林省交通科技发展计划项目(2004-4-07)

摘  要:为了克服林带声衰减量计算过于简化而引起的公路交通噪声预测精度降低的不足,基于植物内部结构及吸声、散射机理的分析,建立了高速公路林带声衰减量计算公式,公式中包含了林带宽度、密度、平均灌幅、高度和林带近路侧距公路中心线距离等特征参数。将该公式应用于公路交通噪声预测模式中,分别与16处阔叶林带、11处针叶林带后监测点夏秋季、冬季噪声实测值进行比较。结果表明:模型预测值与实测值具有良好的一致性,预测误差小于(-0.6±1.7)dB,从而证明了运用该公式计算林带声衰减量的准确性。In order to overcome the shortage of reduction for highway traffic noise prediction accuracy due to simplified calculation on noise attenuation of tree belt, a noise attenuation formula of tree belts at the expressway was built based on analysis of plant inner structure and acoustic absorption and scattering mechanism. The characteristic parameters of tree belt, such as tree belt width, density, average canopy density, height, and distance from the source to the tree belts were included in the formula. The formula was applied to highway traffic noise prediction model. For comparison purposes, the field measurements of 16 broad-leaved tree belts and 11 coniferous tree belts were carried out in the summer, the autumn and the winter. The result shows that the model prediction values agree very well with the measured values. The prediction errors are smaller than (-0.6 ± 1.7) dB between noise prediction values and measured values. The agreement shows that the present expression is valid for the noise attenuation calculation of tree belts.

关 键 词:交通工程 高速公路林带 声学传播原理 声衰减量 特征参数 误差分析 

分 类 号:U491.91[交通运输工程—交通运输规划与管理]

 

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