天津市夏季城区道路不同车道积尘负荷的关系

采用改进的移动式铺装道路积尘采样方法于夏季采集天津市城区不同类型道路各车道的道路积尘样品，计算出积尘负荷，并分析积尘负荷的变化规律。结果表明：天津市区外环线、快速路、主干道、次干道和支路的路面积尘负荷分别为0.06、0.10、0.21、0.22和0.28 g·m-2，天津市道路路面积尘污染强弱顺序为支路 >次干道 >主干道 >快速路 >外环线；对于次干道与支路，不同车道路面积尘负荷差异不大；对于外环线（1车道除外）、快速路和主干道，越接近道路中央积尘负荷越小，且4车道（即慢车道）积尘负荷与其他各车道积尘负荷之间存在线性关系。

Relationships of silt loading between different lanes of roads in Tianjin,China during summer

Using an improved traveling sampling method to collect road dust from different types of urban roads in Tianjin, China during summer, silt loading was calculated and its variation was analyzed. The results showed that the values of silt loading for outer ring roads, expressways, major arterial roads, minor arterial roads, and collector roads in Tianjin were 0.06, 0.10, 0.21, 0.22, and 0.28 g·m-2, respectively. The decreasing order of polluting road dust was from collector roads >minor arterial roads >major arterial roads >expressways >outer ring roads. For collector roads and minor arterial roads, there was little difference in silt loading between lanes. However, for outer ring roads (except the first lane), expressways, and major arterial roads, silt loading was negatively correlated with the distance from the middle of the road, and there was a linear relationship of silt loading between the fourth lane (slow lane) and the other lanes.