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目的了解坑道施工作业环境中空气质量状况,为做好有针对性的坑道施工作业卫生防护工作提供依据。方法对某部坑道施工作业环境中的一氧化碳(CO)、二氧化碳(CO2)、总挥发性有机物(TVOC)、二氧化硫(SO2)和二氧化氮(NO2)等指标进行检测。结果 76个监测点的温度范围为19.9~28.7℃,平均25.14℃;相对湿度为56.3%~97.1%,平均为78.16%。36.92%的检测点CO超标,测值范围为0.41~44.83 mg/m3,平均13.28 mg/m3;15.15%的检测点CO2超标,在0.014%~0.199%,平均0.159%;76个检测点中55个点检出TVOC,其中53.73%的检测点超标,检测值在0.08~4.98 mg/m3之间,平均为1.21 mg/m3;SO2浓度38个检出点的检测值平均为0.54 mg/m3(0.12~1.97 mg/m3),35.94%的检测点超标;NO2浓度41个检出点平均为2.33 mg/m3(0.15~23.85 mg/m3),62.12%的检测点超标。结论坑道施工作业环境相对湿度较大,CO、CO2、TVOC、SO2、NO2都不同程度地超标,尤其是位于施工最前端的作业面,超标尤为严重。建议采取有效措施减少施工坑道内空气污染物、促进污染物的外排,同时做好个人防护。
Objective To understand the status of air quality in tunnel construction work environment and provide the basis for the well-targeted health protection of tunnel construction work. Methods The indexes of carbon monoxide (CO), carbon dioxide (CO2), total volatile organic compounds (TVOC), sulfur dioxide (SO2) and nitrogen dioxide (NO2) in a tunnel construction site were detected. Results The temperature range of 76 monitoring sites was 19.9 ~ 28.7 ℃ with an average of 25.14 ℃. The relative humidity was 56.3% ~ 97.1% with an average of 78.16%. 36.92% of the test sites exceeded the standard of CO, with the range of 0.41-44.83 mg / m3, with an average of 13.28 mg / m3. The 15.15% CO2 exceeded the standard at 0.014% -0.19% with an average of 0.159% TVOC was detected at 53.73% points, with an average value of 1.21 mg / m3 between 0.08 and 4.98 mg / m3 and an average of 0.54 mg / m3 at the 38th detection point of SO2 0.12-1.97 mg / m3), and 35.94% exceeded the standard. The average NO2 concentration of 41 samples was 2.33 mg / m3 (0.15-23.85 mg / m3), and 62.12% exceeded the standard. Conclusion The operating environment of tunnel construction is relatively humid, and CO, CO2, TVOC, SO2 and NO2 are all over-standard to different extents, especially at the front of the construction. The exceeding standard is especially serious. It is recommended that effective measures be taken to reduce the air pollutants in the tunnels and to promote the efflux of pollutants while at the same time doing well personal protection.