摘要
针对我国毒气泄漏生产安全事故中就地避难策略的选择缺乏依据的问题,基于毒气扩散理论、建筑气密性分级模型及毒物浓度伤害准则,评析位于毒气泄漏源不同距离处不同气密性建筑作为“就地避难场所”的可靠性与有效性。结果表明:事故中,室外毒气浓度短时间内达到峰值后迅速回落,而室内毒气浓度达到峰值后回落缓慢;室内毒气浓度达到峰值所需时间受气密性影响小,但其降速随气密性等级的增大而明显放缓。最后,研究提出距泄漏源不同距离处就地避难建筑应达到的气密性水平。
In view of the lack of basis for the selection of shelter-in-place strategy for the toxic gas leakage accidents in the work safety of China,the reliability and effectiveness of buildings with different air tightness located at different distances from the toxic gas leakage source as“in-place shelters”were evaluated and analyzed based on the toxic gas diffusion theory,classification model for air tightness of building envelope and toxic concentration injury criteria.The results showed that in the accident,the outdoor toxic gas concentration reached the peak in a short time and then fell quickly,while the indoor toxic gas concentration reached the peak and then fell slowly.The time required for indoor toxic gas concentration to reach peak was less affected by the air tightness,however,the decreasing velocity obviously slowed down with the increase of the air tightness grade.Finally,the required air tightness levels of shelter buildings with different distances from the leakage source were proposed.
作者
邓月超
孟冲
席学军
谢琳娜
DENG Yuechao;MENG Chong;XI Xuejun;XIE Linna(China Academy of Building Research,Beijing 100013,China;China Academy of Safety Science and Technology,Beijing 100012,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2021年第12期11-16,共6页
Journal of Safety Science and Technology
基金
国家重点研发计划项目(2017YFC0804900)。
关键词
毒气泄漏
建筑气密性
就地避难
浓度
有效性
高斯烟团模型
toxic gas leakage
air tightness of building
shelter-in-place
concentration
effectiveness
Gaussian puff diffusion model
