上跨既有线铁路隧道路基石方控制爆破施工技术  

Construction Technology of Controlled Blasting of Embankment of Railway Tunnel Overpass the Existing Railway Line

作　　者：赵富民 ZHAO Fumin(No.1 Engineering Development Co.,Ltd.,of China Railway 14th Bureau Group,Rizhao,Shandong Province,276826 China)

机构地区：[1]中铁十四局集团第一工程发展有限公司,山东日照276826

出　　处：《科技创新导报》2022年第20期66-68,95,共4页Science and Technology Innovation Herald

摘　　要：本文以云南省昆明市呈贡42号路石方爆破施工为背景,在大方量石方爆破的情况下,为确保上跨既有线铁路隧道的石质路堑爆破开挖过程中铁路隧道安全,控制爆破最大振速,通过爆破施工前期准备、爆破方案选取、爆破参数设计等选取以电子雷管作为起爆器材的浅孔精准控制爆破技术,并对该方案进行了安全校核及制定相应的安全技术措施,以确保施工安全。通过对现场的爆破效果分析,这一爆破技术能有效地控制爆破振速。This paper takes the stone blasting construction of Chenggong No.42 road in Kunming,Yunnan Province as the background.In case of large-scale stone blasting,in order to ensure the safety of the railway tunnel during the blasting excavation of the stone overpass the existing railway tunnel and control the maximum vibration speed of the blasting,the shallow hole precise control blasting technology with electronic detonators as the detonating equipment was selected through the preparation in the early stage of blasting construction,the selection of blasting scheme,the design of blasting parameters,etc.,and the safety check of the scheme was carried out and the corresponding safety technical measures were formulated,to ensure construction safety.Through the analysis of the blasting effect on site,the blasting technology can effectively control the blasting vibration speed.

关 键 词：路堑开挖 浅孔爆破 爆破振速 上跨隧道 

分 类 号：U416.113[交通运输工程—道路与铁道工程]