不同营造模式绿化带降噪效果研究

Research on Noise Reduction Effect of Greenbelt in Different Construction Modes

选取池州市8个不同营造模式的绿化带,通过模拟噪声源和沿绿化带方向定向、定点测量噪声强度,分析全乔型、乔灌结合型、全灌型、全草型4种典型绿化带下噪声值与空间水平距离之间的关系,求取线性拟合函数,获得不同绿化带营造模式的降噪效果。结果表明:全灌型绿化带降噪效果最明显,全草型绿化带降噪效果最差。城市道路绿化带在栽种植被时,应优先选择分支点低、分支多、枝叶细密的常绿植物,同时选取不同层次的植物合理搭配,以最大限度消除交通噪声对居民生活的影响。

In this experiment,8 different greening belts in Chizhou City were selected,and the noise intensity was measured by simulating the noise source,orientating and locating along the direction of the greening belt.The rela-tionship between the noise value and the spatial horizontal distance under a typical green belt.A linear fitting func-tion is obtained to obtain the noise reduction effect of different green belt construction models.The results showedthat the noise reduction effect of the green belt combined with whole straw was the most obvious,while the noise re-duction effect of the green belt with whole grass was the worst.When vegetation is planted in urban road green belts,evergreen plants with low branching points,many branches and fine branches and leaves should be selected first.At the same time,plants of different levels should be selected rationally to eliminate the influence of traffic noise on resi-dents lives to the maximum extent.