地下加工间颗粒物分布特性及控制措施研究

施工现场的地下预制加工间普遍存在施工强度大,作业人员密集,不规律的气流组织导致施工环境质量恶劣等问题。对西安市某施工项目的地下预制加工间内可吸入颗粒物进行了实测和数据分析,其中通风加工间和给排水加工间分别有等离子切割机、共板式法兰机、型材切割机和台式砂轮机等加工部件装置。经测试,等离子切割机为产尘量最高的机械装置,该装置开启后颗粒物浓度迅速上升至999μg/m³,其余加工部件装置在正常运行条件下的产尘量均不等。因此,分别从污染源、传播途径、末端防护三个层面来分析并设计控制措施方案,解决施工人员长期暴露在高浓度可吸入颗粒物环境下的此类问题。

Research on Distribution Characteristics and Control Measures of Particulates in Underground Processing

The underground prefabricated processing rooms on the construction site generally have the problems of high construction intensity,intensive operation personnel,and irregular airflow organization,leading to poor construction environment quality.In this paper,the actual measurement and data analysis of inhalable particulate matter in the underground prefabricated processing room of a construction project in Xi'an City were carried out.Among them,there are plasma cutting machine,common plate flange machine,profile cutting machine and table grinding wheel in the ventilation processing room and water supply and drainage processing room.Machine parts such as machine.After testing,the plasma cutting machine is the mechanical device with the highest dust production.After the device is turned on,the particulate matter concentration quickly rises to 999μg/m³,and the remaining processing parts and devices produce unequal dust production under normal operating conditions.Therefore,analyze and design control measures from three levels:pollution source,transmission route,and end protection,to solve such problems of long-term exposure of construction workers to high concentrations of inhalable particulate matter.