隧道近接施工中的爆破方法与数值研究  

Blasting Method and Numerical Research in Tunnel Proximity Construction

作　　者：杨永龙 YANG Yonglong(China Railway 18th Bureau Group Tunnel Engineering Co.,Ltd.,Guangzhou 510880,China)

机构地区：[1]中铁十八局集团隧道工程有限公司,广东广州510880

出　　处：《佳木斯大学学报（自然科学版）》2023年第3期108-111,共4页Journal of Jiamusi University：Natural Science Edition

摘　　要：当前国内常使用近接施工方法开展隧道施工,但由于一些施工环境较为复杂,如果不对爆破方案进行优化,会增加施工人员伤亡和发生经济损失的风险。因此此次研究以国内某采用近接施工方法施工,且靠近一个已知隧道的隧道施工工程为案例,为其设置具有一定通用性的爆破方案并布置爆破振速数据收集系统。收集数据的分析结果显示,使用单一函数拟合峰值振速的效果并不够好。迎爆侧的振动效应明显大于背爆侧,同时背爆侧的峰值振速较小、分布更为集中。对于新建隧道,使用钻爆+机械的混合开挖方式较掌子面掏槽爆破施工方式能降低爆破带来的振动不良影响。At present,the proximity construction method is often used in tunnel construction in China.However,due to the complex construction environment,if the blasting plan is not optimized,it will increase the risk of construction personnel casualties and economic losses.Therefore,this study takes a tunnel construction project in China that adopts the construction method of proximity construction and is close to a known tunnel as an example,and sets up a blasting scheme with certain generality and arranges a blasting vibration velocity data collection system.Analysis of the collected data revealed that a single function fit the peak vibration velocity was not good enough.The vibration effect on the front blast side is obviously larger than that on the back blast side,and the peak vibration velocity on the back blast side is smaller and the distribution is more concentrated.For new tunnels,the mixed excavation method of drilling and blasting+machinery can reduce the adverse effects of vibration caused by blasting compared with the tunnel face cutting and blasting construction method.

关 键 词：隧道 近接施工 爆破方法 峰值振速 

分 类 号：U455[建筑科学—桥梁与隧道工程] TU193[交通运输工程—道路与铁道工程]