| 高铁长城站小净距隧道爆破振动效应研究 |
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| 引用本文： | 梁书锋,凌天龙,李晨.高铁长城站小净距隧道爆破振动效应研究[J].爆破,2021,38(1):116-123,139. |
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| 作者姓名： | 梁书锋 凌天龙 李晨 |
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| 作者单位： | 中国矿业大学(北京)力学与建筑工程学院,北京100083;泰山学院机械与建筑工程学院,泰安271000;中国矿业大学(北京)力学与建筑工程学院,北京100083 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目;泰山学院引进人才科研启动基金 |
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| 摘 要： | 小净距隧道开挖工程中,隧道爆破对中隔墙的稳定性影响极大,横通道的施工则会进一步加剧中隔墙的振动破坏。为研究爆破作用下中隔墙的振动响应特征,以新建京张高铁长城站小净距隧道工程为背景,分析非电雷管爆破地震波在中隔墙中的振动特征和衰减规律,同时开展电子雷管降振试验,对隧道爆破炮眼的合理延时进行研究。研究结果表明:受纵、横隧道分割的影响,中隔墙末端振动存在明显的放大效应;掌子面后方中隔墙受爆破振动的影响大于掌子面前方岩体,应用萨道夫斯基公式对爆破数据进行回归分析时,K前
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| 关 键 词： | 小净距隧道 振动测试 时频分析 降低振动 |
Blasting Vibration Effect of Small-Spaced Tunnel at Great Wall High Railway Station |
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| LIANG Shu-feng,LING Tian-long,LI Chen.Blasting Vibration Effect of Small-Spaced Tunnel at Great Wall High Railway Station[J].Blasting,2021,38(1):116-123,139. |
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| Authors: | LIANG Shu-feng LING Tian-long LI Chen |
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| Affiliation: | (China School of Mechanics&Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;College of Mechanical and Architectural Engineering,Taishan University,Taian 271000,China) |
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| Abstract: | In the excavation of small-spaced tunnels,tunnel blasting has a great impact on the stability of the interlaid rock wall,and the construction of the cross passage will further aggravate the vibration damage of the interlaid rock wall.In order to study the vibration response of the interlaid rock wall under blasting,we monitored the vibration velocity of the interlaid rock wall caused by blasting with non-electric detonator in the small-distance tunnel project of Great Wall station of the new-built Beijing-Zhang Jiakou high-speed railway,and then analyzed the attenuation law of the seismic wave in the interlaid rock wall.At the same time,the vibration reduction tests of blasting with electronic detonator have been carried out to study the reasonable delay time of tunnel blasting hole.Through experimental research,some conclusions have been obtained.Firstly,the vibration of the end of the interlaid rock wall has obvious amplification effect due to the influence of vertical and horizontal tunnel segmentation.Secondly,the regression analysis of blasting vibration data by Sadovsky′s formula shows that K front
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| Keywords: | small spacing tunnels vibration tests time-frequency analysis decreasing vibration |
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