连拱隧道爆破振动响应与减振技术研究  

Study on the Blasting Vibration Response and Control Technology in Multi-arch Tunnels

作　　者：和振海 孙印国 罗忠荣 姜成业 于建新[5] HE Zhenhai;SUN Yinguo;LUO Zhongrong;JIANG Chengye;YU Jianxin(Yunnan Menglu Expressway Investment and Development Co.Ltd.,Puer 665000,China;China Railway Development Investment Group Co.Ltd.,Kunming 650500,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100000,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]云南勐绿高速公路投资开发有限公司,普洱665000 [2]中铁开发投资集团有限公司,昆明650500 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [4]中国科学院大学,北京100000 [5]河南理工大学土木工程学院,焦作454003

出　　处：《武汉理工大学学报（交通科学与工程版）》2022年第4期677-681,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：云南省交通运输厅科技项目[2019]79号。

摘　　要：岩质连拱隧道采用钻爆法施工中,爆破对隧道围岩及中隔墙产生振动影响,需进行严格的振动控制.以某复式连拱隧道爆破施工为工程背景,采用ANSYS/LS-DYNA建立数值仿真模型,研究上下台阶不同进尺下的爆破振动响应与不同隔振层参数下的减振技术.结果表明:1.2 m进尺爆破开挖下,先行洞复合式中墙的振动速度从迎爆侧边墙向拱顶和拱脚处逐渐减小,测点振速最大为66.9 cm/s,振速最小为1.22 cm/s;0.6 m进尺和1.2 m进尺爆破方案最大振动速度均出现在迎爆侧距离底板4.0 m左右处;在上下台阶爆破开挖时,上台阶引起中墙的振动较下台阶大,隔振层对复合式中墙隧道爆破振动控制具有显著作用.In the construction of rock multi-arch tunnel by drilling and blasting method,blasting has a vibration effect on the surrounding rock and the middle wall of the tunnel,so it is necessary to strictly control the vibration.Taking the blasting construction of a compound multi-arch tunnel as the engineering background,the numerical simulation model was established by ANSYS/LS-DYNA,and the blasting vibration response of the upper and lower steps with different footage and the vibration reduction technology with different vibration isolation layer parameters were studied.The results show that,under 1.2 m footage blasting excavation,the vibration velocity of the compound middle wall of the first tunnel gradually decreases from the side wall facing the blasting to the vault and arch foot,with the maximum vibration velocity of the measuring point being 66.9 cm/s and the minimum vibration velocity being 1.22 cm/s.The maximum vibration speed of 0.6 m footage and 1.2 m footage blasting schemes both appear at the distance of 4.0 m from the floor at the side facing the explosion.During the blasting excavation of upper and lower steps,the vibration of the middle wall caused by the upper step is larger than that caused by the lower step,and the vibration isolation layer plays a significant role in the blasting vibration control of the compound middle wall tunnel.

关 键 词：连拱隧道 爆破开挖 振动响应 振动控制 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]