大跨度小净距隧道爆破振动响应研究  

Response of Large-span Tunnel to Blasting Vibration of Small Clear Spacing Tunnel Excavation

作　　者：梁琨 王树欣 张宪堂[1,2] 焦淑军 王海亮 LIANG Kun;WANG Shu-xin;ZHANG Xian-tang;JIAO Shu-jun;WANG Hai-liang(Shandong Key Laboratory of Disaster Prevention and Mitigation of Civil Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;School of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Rizhao Municipal Engineering Group,Rizhao 276800,China)

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,青岛266590 [2]山东科技大学土木工程与建筑学院,青岛266590 [3]山东科技大学安全与环境工程学院,青岛266590 [4]日照市政工程集团,日照276800

出　　处：《爆破》2021年第2期67-72,159,共7页Blasting

基　　金：国家自然科学基金(51874189);山东省自然科学基金(ZR2017MEE043、ZR2019PEE044);山东研究生教育创新计划项目(SDYY15086、SDYY15088)。

摘　　要：以济南市顺河快速路南延(英雄山立交至南绕城高速)建设工程为工程背景,结合现场爆破振动监测及ANSYS/LS-DYNA建立模型进行对比研究,分析小净距隧道爆破开挖中,先行洞在后行洞上台阶爆破作用下的动力响应。结果表明:先行洞三向振速中,X水平径向振速最大,且与合速度大小接近,先行洞振速由掌子面后方至隧道入口处呈现衰减趋势,提出了现场监测应根据对于X水平径向的数据调整爆破方案参数。针对济南隧道的施工条件,现场采用CD法施工方法,通过控制实际爆破单段药量、炮孔深度、超前小导管、复合衬砌超前支护等措施取得了良好的爆破效果。Taking the construction project of south extension of Shunhe Expressway,Yingxiong Mountain overpass to South Ring Expressway,in Jinan city as an example,dynamic response of step blasting in rear tunnel to advance tunnel with the field blasting vibration monitoring and simulation with ANSYS/LS-DYNA,the dynamic response of the excavated tunnel to the up-step blasting of the excavating tunnel with small distance was analyzed.The results show that the X horizontal radial velocity is the largest and is close to the combined velocity in the three-direction velocity of the excavated tunnel.The vibration velocity of the excavated tunnel decreases from the back of working face to the entrance of the tunnel,and the parameters of blasting scheme should be adjusted according to the data of X horizontal radial in the field monitoring was proposed.According to the construction conditions of Jinan tunnel,the construction method of CD method is adopted,and good blasting effect is achieved by controlling the actual blasting charge of single section,hole depth,small leading pipe and composite lining supporting methods,which can provide some reference for other projects.

关 键 词：小净距隧道 爆破振动 钻爆施工 振动监测 数值模拟 

分 类 号：U455[建筑科学—桥梁与隧道工程]