基于净化空气功能的珲乌高速公路沿线林带设计研究

Design and Research of Greening Forest Belt along the Hunchun-Ulanhaote Expressway Based on Air Purification Function

公路绿化林带具有净化空气的作用。当下垫面为植被时,汽车尾气的主要成分(CO、NOX和PM10)将不可逆转地被植被吸滞,即干沉降现象。根据这一原理对珲乌高速公路沿线林带进行设计研究。对公路的交通量及空气污染状况进行调查,设定林带净化效应设计目标,确定林带栽植形式,计算林带的主要参数,绘制林带的标准断面图。结果表明,基于净化空气功能的珲乌高速公路北侧林带宽度应为34m,所需阔叶乔木、针叶乔木、灌木总计4401株;南侧林带宽度应为15m,所需阔叶乔木、针叶乔木、灌木总计2660株,该设计方法可为以净化空气为目的的道路绿化设计提供参考。

Highway greenbelts have the function of air purification.When the underlying surface is vegetation,the main components of automobile exhaust (CO,NO X and PM 10) will be irreversibly stagnated by vegetation,that is the so called phenomena of dry deposition.According to this principle,the greening forest belt along the Hunchun-Ulanhot Expressway was designed and studied.Through the investigation of the traffic volume and air pollution status of the highway,the design goal of the greening forest belt purification effect was set to determine the planting form of the green forest belt,and to calculate the main parameters of the forest belt.Finally a standard section of the forest belt was drawn.The results showed that the width of the green belt along the north side of the Hunchun-Ulanhaote Expressway based on the function of purifying air should be 34 m,and the total number of broad-leaved trees,coniferous trees and shrubs required was 4 401;the width of the greening forest belt on the south side should be 15 m,a total of 2 660 broad-leaved trees,coniferous trees and shrubs were required.This design method could provide reference for road greening design for the purpose of purifying air.