隧道近距离下穿既有引水隧洞爆破振动影响研究  

作　　者：严雅梅 管亚君 陈旭强 

机构地区：[1]浙江交工集团股份有限公司设计院分公司,杭州310051 [2]杭州余杭区交通项目管理有限公司,杭州311100

出　　处：《科技创新与应用》2024年第17期63-67,共5页Technology Innovation and Application

摘　　要：爆破施工对临近既有隧洞结构安全影响较大,以工程实际为例,采用数值模拟方式分析爆破施工对既有隧洞的振动影响。结果表明,既有隧道影响面与爆源距离直接影响爆破振动速度,在同一断面上,隧道顶部和侧方振动速度要高于底部区域,同时爆破药量对临近既有隧洞影响较大,建议合理控制装药量和爆破控制范围减小爆破施工对既有隧洞的影响。该研究内容可为类似工况隧道爆破施工提供理论参考借鉴。Blasting construction has a great influence on the structural safety of the adjacent existing tunnel.Taking the engineering practice as an example,the influence of blasting construction on the vibration of the existing tunnel is analyzed by numerical simulation.The results show that the distance between the influence surface and the blasting source of the existing tunnel directly affects the blasting vibration velocity.On the same section,the vibration velocity of the top and side of the tunnel is higher than that of the bottom area,and the amount of blasting charge has a great influence on the adjacent existing tunnel.It is suggested that the charge quantity and blasting control range should be reasonably controlled to reduce the influence of blasting construction on the existing tunnel.This study can provide theoretical reference for tunnel blasting construction under similar working conditions.

关 键 词：隧道 爆破 振速 数值模拟 位移 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]