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文章通过对广西现有高速公路沿线绿化带种类、结构进行调查、对不同结构类型绿化带对交通噪声的降噪效果监测、统计等,分析高速公路现有绿化带不同类型结构与其交通噪声降噪效果的关系。结果表明,广西高速公路沿线绿化林带结构、类型等直接决定其最大附加衰减值大小。绿化林带在垂向和横向上结构越复杂、枝叶遮密度越密,层次空间越丰富,最大附加衰减值越明显。
Through the investigation of the types and structures of the greenbelts along the existing expressways in Guangxi and the monitoring and statistics on the noise reduction effects of the greenbelts with different types of structures, the paper analyzes the different types of greenbelts of the expressway and their traffic noise reduction The effect of the relationship. The results show that the structure and type of greenbelts along Guangxi Expressway directly determine the maximum additional attenuation value. The more complex the vertical and horizontal greenbelts are, the more dense the branches and leaves are, the more abundant the layers and the greater the maximum additional attenuation is.