长大隧道沥青路面铺装中温拌阻燃技术对施工环境的影响

Influence of Warm-Mixed Flame Retardant Technology on Construction Environment of Asphalt Pavement in Long Tunnel

以长大隧道为研究对象,分别测试热拌工艺和温拌阻燃工艺条件下隧道中部挥发性有机化合物(VOC)体积分数、CO体积分数和照度在施工区域的变化情况,由此分析评价温拌阻燃工艺对长大隧道沥青路面施工环境的影响。结果表明:长大隧道铺装采用热拌工艺时,整个作业区域内的沥青烟质量浓度数值均偏高,且部分区域超出了阈值,照度均在人行照度标准之下;而采用温拌阻燃工艺时,施工区域沥青烟质量浓度降低显著,其中VOC体积分数降低26.8%,CO体积分数降低21.9%,施工区域照度提高103.2%,施工环境得到显著提升;良好的隧道铺装施工环境不仅有利于施工人员的身心健康,而且有助于提高隧道铺装施工质量。

With the long tunnel as the research object,the variation of volatile organic compound(VOC)volume fraction,CO volume fraction,and illuminance in the construction area of the middle of the tunnel under the conditions of hot mix technology and warm-mixed flame retardant technology was tested respectively,and the influence of warm-mixed flame retardant technology on the construction environment of asphalt pavement in long tunnels was analyzed and evaluated.The results show that when the pavement of a long tunnel adopts hot mix technology,the mass concentration of asphalt fume in the whole operation area is relatively high,and that in some areas exceeds the threshold value.The illuminance is below the pedestrian illuminance standard.When warm-mixed flame retardant technology is employed,the mass concentration of asphalt fume in the construction area is significantly reduced.VOC volume fraction is reduced by 26.8%,and CO volume fraction is reduced by 21.9%.The illuminance in the construction area is increased by 103.2%,and the construction environment has been significantly improved.A good construction environment of tunnel pavement is not only conducive to the physical and mental health of the construction personnel but also contributes to the quality of tunnel pavement construction.