小近距隧道扩挖爆破作用下邻洞振动响应研究  

Study on Vibration Response of Adjacent Tunnel Induced by Expansion Excavation Blasting of Closely-spaced Tunnels

作　　者：林立宏 倪迪 朱爱山 彭亚雄 吴立[4] LIN Li-hong;NI Di;ZHU Ai-shan;PENG Ya-xiong;WU Li(Taizhou Communications Investment Group,Taizhou 318000,China;Zhejiang Tunnel Engineering Group,Hangzhou 310005,China;Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring,Hunan University of Science and Technology,Xiangtan 411201,China;Faculty of Engineering,China University of Geoscieneces,Wuhan 430074,China)

机构地区：[1]台州市交通投资集团有限公司,台州318000 [2]浙江省隧道工程集团有限公司,杭州310005 [3]湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室,湘潭411201 [4]中国地质大学(武汉)工程学院,武汉430074

出　　处：《爆破》2020年第1期141-146,共6页Blasting

基　　金：浙江省交通运输厅科研计划项目(2018013);国家自然科学基金(41672260)。

摘　　要：在小近距隧道扩挖工程中,隧道爆破引起邻洞振动,对既有隧道结构稳定性造成较大影响。为研究爆破作用下邻洞隧道振动响应特征,依托浙江省温岭市楼山隧道扩挖工程,采用现场振动测试试验和数值模拟方法,研究爆破作用下邻洞隧道振动特征及衰减规律,并对比了爆破隧道与邻洞隧道振动响应差异性。结果表明:爆破掏槽段炸药引起的隧道振动最大。在爆破近区,隧道扩挖爆破对邻洞隧道振动响应的影响更大。邻洞隧道的迎爆侧离爆源近,隧道振动强度大;既有隧道空间对振动衰减作用较大,背爆侧的振动强度相对较小。In the expansion excavation project of closely-spaced tunnels,the blast vibrations from the tunnel under construction have a great influence on the stability of the existing adjacent tunnel.Based on the expansion excavation project of Loushan Tunnel in Wenling City,Zhejiang Province,the vibration characteristics and attenuation law of the adjacent tunnel under blasting effects were studied by field vibration tests and numerical simulation.In addition,the vibration response from the tunnel under blasting construction was compared with that of the adjacent tunnel.The results show that the vibrations induced by cut holes have the largest amplitudes.The vibration response of the adjacent tunnel is more influenced by the near-area blasting.The vibration intensity of the adjacent tunnel is higher on the side closer to the blasting site.Whereas the vibration intensity of reverse side is relatively lower for the existing tunnel space has a great attenuation effect on vibration.

关 键 词：小近距隧道 扩挖 爆破作用 邻洞隧道 振动速度 

分 类 号：TD235.1[矿业工程—矿井建设]