摘要
爆破作业是地铁隧道施工常用的技术手段,但随着隧道长度、深度的延伸,地铁隧道掘进过程中,常出现爆后粉尘弥漫时间长、降尘效率低等问题,严重威胁施工人员的身体健康,降低施工效率。为更加高效快速地减少钻爆法施工过程中产生的粉尘颗粒,提出了一种快速水雾化除尘技术。依托青岛地铁6号线华山1路西侧斜井工程进行现场试验,利用液态CO_(2)吸热产生的相位变化提升储罐内压,形成高速、高压的水射流可以远距离喷射至掌子面处,最终通过雾化的水滴将粉尘颗粒包裹成团,通过重力自降达到快速降尘的目的。研究结果表明:在爆后15 min范围内,快速水雾化除尘技术可使爆破后产生的PM10、TSP浓度的最大降幅分别达到24.84%、27.68%。快速水雾化降尘技术可以短时间内达到爆后除尘的目的,有效改善施工环境,加快施工进度。
Blasting operation is a commonly used technical means in subway tunnel construction,but with the extension of tunnel length and depth,problems such as long diffusion time of dust after explosion and low dust reduction efficiency often occur in the process of subway tunnel excavation,which seriously threaten the health of construction personnel and reduce construction efficiency.In order to reduce the dust particles produced in the construction process of drilling and blasting method more efficiently and quickly,a rapid water atomization and dust removal technology is proposed.Based on the field test of the inclined shaft project on the west side of Huashan Road 1 of Qingdao Metro Line 6,the phase change caused by the heat absorption of liquid CO_(2) is used to increase the internal pressure of the storage tank to form a high-speed and high-pressure water jet which can be sprayed to the face of the palm over a long distance.Finally,the dust particles are wrapped up by atomized water droplets,and the rapid dust reduction is achieved by gravity self-drop.The results show that in the range of 15 min after blasting,the rapid water atomization and dust removal technology can reduce the concentration of PM10 and TSP by 24.84%and 27.68%,respectively.Rapid water atomization and dust removal technology can achieve the purpose of dust removal after explosion in a short time,effectively improve the construction environment and speed up the construction progress.
作者
缪玉松
王海亮
王振彪
王晓静
辛林
于福
鲍汝苍
MIAO Yu-song;WANG Hai-liang;WANG Zhen-biao;WANG Xiao-jing;XIN Lin;YU Fu;BAO Ru-cang(School of Science,Qingdao University of Technology,Qingdao 266525,Shandong,China;Safety and Environmental Engineering College,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;Hebei Feipu Environmental Protection Technology Co.,Ltd.,Shijiazhuang 050072,China;China Communications Construction Co.,Ltd.Rail Transit Branch,Qingdao,Shandong,China;The 5 th Engineering Co.,Ltd.,of China Railway 25 th Bureau Group,Qingdao 266000,Shandong,China)
出处
《工程爆破》
CSCD
北大核心
2023年第1期130-137,共8页
Engineering Blasting
基金
国家自然科学基金资助项目(51879135,52604004)
山东省自然科学基金资助项目(ZR2019BA023)。
