摘要
为减小新建隧道爆破施工对既有隧道的影响,且满足爆破开挖引起既有隧道的爆破振动速度不得超过2cm/s的要求。以在建赣深高铁羊台山隧道近似平行上穿既有广深高铁的羊台山隧道为工程背景,基于萨道夫斯基经验公式,推导出爆破药量和振动速度的对应关系模型,并反演满足振动速度为2 cm/s时,上、下台阶法施工对应的最大控制药量,为优化爆破设计方案、指导现场施工提供了依据。
The blasting vibration velocity of existing tunnel caused by blasting excavation should not exceed 2 cm/s.In order to reduce the impact of the blasting of new tunnel on the existing tunnel,the blasting vibration response characteristic was investigated.The data of blast vibration was monitored during the construction process of the Yangtaishan tunnel of the Ganshen high-speed railway overpassing the existing tunnel of GuangShen high-speed railway.Consequently,the corresponding relationship between blasting charge and vibration velocity was obtained according to the Sadowski's empirical formula.The maximum explosive charge for the excavating of upper and lower steps was calculated,when the vibration velocity is controlled at the value of 2 cm/s.This study can provide a theoretical basis for the optimizing of blasting design and the construction of tunnel.
作者
朱和昆
张庆彬
李传华
唐伟伟
刘公剑
颜天成
ZHU He-kun;ZHANG Qing-bin;LI Chuan-hua;Tang Wei-wei;LIU Gong-jian;YAN Tian-cheng(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;China Railway Tenth Bureau Group Urban Rail Transit Engineering Co.,Ltd.,Guangzhou 510000,China)
出处
《交通科学与工程》
2021年第3期65-71,共7页
Journal of Transport Science and Engineering
基金
中国铁路工程集团有限公司科技项目(2019-重点-15)
中铁十局集团有限公司科技项目(2019-39)。
关键词
爆破开挖
既有隧道
爆破振动
优化爆破
Excavation by blasting
existing tunnel
blasting vibration
optimized blasting
