摘要
在既有隧道附近修建新的隧道,爆破产生的振动波对既有隧道围岩及衬砌的安全会造成影响,在隧道爆破监测和安全预测中,峰值振动速度和振动频率是常用的安全标准。根据邻近隧道的爆破振动对既有隧道的影响,采用现场监测和数值模拟方法对既有隧道的爆破振动速度和振动频率进行了监测,探讨了在邻近隧道爆破作用下,既有隧道的振动速度分布状况及相应的功率谱密度分布状况。结果表明,隧道的爆破振动速度随着爆破距离呈指数衰减规律,距离对爆破的影响较大;由现场监测的功率谱可知,爆破产生的振动频率与既有隧道的固有频率有一定差距,爆破不会导致共振现象的发生,数值模拟与现场监测结果吻合较好。
When a new tunnel is built near an existing tunnel,the vibration wave generated by blasting will affect the safety of the surrounding rocks and lining of the existing tunnel.In tunnel blasting monitoring and safety prediction,peak vibration velocity and vibration frequency are commonly used safety standards.In order to study the influence of blasting vibration on the existing tunnel,the blasting vibration velocity and vibration frequency of the existing tunnel are studied by means of field monitoring and numerical simulation,and the vibration velocity distribution and power spectrum density distribution of the existing tunnel under the blasting action of the adjacent tunnel are studied.The results show that the blasting vibration velocity of tunnel decreases exponentially with the blasting distance,and the distance has a great influence on the blasting.According to the power spectrum of field monitoring,there is a certain gap between the vibration frequency generated by blasting and the natural frequency of existing tunnel,and blasting will not lead to resonance phenomenon.The numerical simulation in this paper is in good agreement with the field monitoring results.
作者
方智淳
朱正国
Fang Zhichun;Zhu Zhengguo(College of Architectural Engineering,Tongling University,Tongling,Anhui 240000,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)
出处
《黑龙江工业学院学报(综合版)》
2025年第3期127-132,共6页
Journal of Heilongjiang University of Technology(Comprehensive Edition)
基金
国家自然科学基金项目“灾毁隧道快速抢修新型支护结构作用机制研究”(项目编号:52478406)
安徽高校自然科学研究重点项目“基于均匀化理论的高地应力互层岩体隧道变形机理与破坏形式研究”(项目编号:2024AH051850)
铜陵学院校级科研重点项目“高地应力软硬互层隧道岩体变形机理与破坏形式研究”(项目编号:2023tlxyZD02)。
关键词
隧道爆破扰动
爆破振动监测
动力响应
数值模拟
功率谱分析
tunnel blasting disturbance
blasting vibration monitoring
dynamic response
numerical simulation
power spectrum analysis
作者简介
方智淳,博士,讲师,铜陵学院建筑工程学院。研究方向:隧道与地下工程;通信作者:朱正国,博士,教授,博士生导师,石家庄铁道大学土木工程学院。研究方向:隧道与地下工程。
