摘要
邻近既有隧道的爆破工程施工会对隧道的安全稳定性产生影响,结合走马湖水系综合治理工程(鄂州机场配套项目)中2#山土石方爆破工程,采用LS-DYNA有限元计算软件对邻近开挖区域的既有城际铁路隧道振动响应进行数值模拟分析,结果表明隧道断面与爆源之间的距离是影响峰值爆破振动速度的关键因素,同时隧道口在边界效应影响下对爆破扰动更为敏感,且在同一断面下隧道顶部和侧方振动速度要高于底部区域,在工程施工过程中需结合爆破参数优化和爆破振动监测等手段重点关注距离爆源最近断面拱顶、拱腰和隧道出口处的影响。
Nearby existing tunnel blasting construction affect the safety of the tunnel stability,to take up the lake is a comprehensive engineering(Ezhou airport project)2#mountain conditions in blasting engineering,using lS-DYNA finite element software to the existing inter-city railway tunnels vibration response to the adjacent excavation area is analyzed in numerical simulation.The analysis shows that the distance between the tunnel section and the explosion source is still the key factor affecting the peak value of blasting vibration velocity,and the tunnel mouth is more sensitive to blasting disturbance under the influence of boundary effect,and the vibration velocity of the tunnel top and side is higher than that of the bottom area under the same section.In the process of engineering construction,it is necessary to combine the optimization of blasting parameters and the monitoring of blasting vibration to pay attention to the influence of the vault,middle section and tunnel exit nearest to the explosion source.
作者
贾永胜
司剑峰
韩传伟
黄小武
王洪刚
钱坤
黄炳林
JIA Yong-sheng;SI Jian-feng;HAN Chuan-wei;HUANG Xiao-wu;WANG Hong-gang;QIAN Kun;HUANG Bing-lin(State Key Laboratory of Precision Blasting Engineering,Jianghan University,Wuhan 430056,China;Hubei Key Laboratory of Blasting Engineering,Jianghan University,Wuhan 430056,China;Wuhan Explosion&Blasting Co.,Ltd.,Wuhan 430056,China;China Railway Siyuan Group Engineering Construction Co.,Ltd.,Wuhan 430061,China)
出处
《工程爆破》
CSCD
北大核心
2023年第3期1-7,共7页
Engineering Blasting
基金
湖北省自然科学基金资助项目(2022CFB594)
爆破工程湖北省重点实验室基金资助项目(BL2021-15,BL2021-11)
湖北省重点研发计划基金资助项目(2020BCA084)。
关键词
露天爆破
数值模拟
既有隧道
爆破振动
open blasting
numerical simulation
existing tunnels
blasting vibration
