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台车周边施工作业人员面临的职业健康危害是钻爆法隧道施工中普遍存在的问题。基于此，提出了洞外压入送风协同洞内起拱点处空气品质营造装置局部空气净化的通风方案，并以广西天巴高速廷社隧道为试验隧道，对两种通风方式下隧道内台车周边的粉尘浓度、空气温度进行了监测和对比，利用FLUENT软件对游离SiO2粉尘浓度场的演化进行了数值模拟。结果表明：在安设空气品质营造装置的条件下通风20 min后，台车处粉尘浓度高、水化热现象均得到了明显的缓解。研究结果对改善钻爆法施工隧道作业环境具有重要的指导意义。
Abstract：The occupational health hazards faced by construction workers around the trolley are a common problem in tunnel construction using drilling and blasting methods.Based on this, a ventilation scheme is proposed for the local air purification of the air quality improvement device at the arch point inside the tunnel in collaboration with compressed air supply outside the tunnel.Using the Tingshe Tunnel of Tianba Expressway in Guangxi as an experimental tunnel, the dust concentration and temperature around the trolley in the tunnel were monitored and compared by two ventilation methods.FLUENT simulation software was used to simulate the evolution of the free SiO2 dust concentration field.The results of the study show that under the condition of installing an air quality improvement device and ventilation for 20 min, the high dust concentration and hydration heat phenomenon at the trolley are significantly improved.The research results have important guiding significance for improving the working environment of tunnel construction using drilling and blasting methods.
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基本信息:
DOI：10.13578/j.cnki.issn.1671-1556.20221318
中图分类号:U455.41
引用信息:
[1]邓欢,陈世强,吴世先等.钻爆法隧道洗尘消热与台车周边作业环境营造[J].安全与环境工程,2024,31(04):68-74.DOI:10.13578/j.cnki.issn.1671-1556.20221318.
基金信息:
国家自然科学基金项目(52264016); 交通运输部交通运输行业重点科技项目(2021-MS5-126); 湖南省自然科学基金项目(2023JJ50232、2023JJ50106)