既有地铁车站地连墙爆破拆除施工振动分析  

Vibration Analysis of Blasting Demolition Construction of Diaphragm Wall in Existing Subway Station

作　　者：孙森 张东明 高志轩 康飞 周亚东 Sun Sen;Zhang Dongming;Gao Zhixuan;Kang Fei;Zhou Yadong(Eighth Engineering Co.,Ltd.CCCC First Highway Engineering Co.,Ltd.,Tianjin 300170,China;College of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]中交一公局第八工程有限公司,天津300170 [2]天津城建大学土木工程学院,天津300384

出　　处：《市政技术》2024年第9期112-120,共9页Journal of Municipal Technology

基　　金：天津市自然科学基金重点资助项目(18JCZDJC10010)。

摘　　要：盾构在掘进过程中遇到地连墙阻碍时,采用爆破拆除是一种高效的技术方法。因此,结合天津地铁7号线八里台站地连墙爆破拆除工程,采用数值模拟和现场监测的方法,对地铁车站以及周围建筑物的位移变化和振动传播规律进行了研究分析,即利用有限元软件MIDAS/GTS-NX建立三维模型并采用现场监测数据验证了模型的准确性。其结果为爆破振动速度在监测点处与模拟结果基本吻合,且均满足安全规范要求;爆破振动速度以炮孔为中心向四周迅速传播,达到峰值后逐渐衰减,10m之外的振动速度降至2cm/s左右。When the shield tunneling is hindered by the diaphragm wall,the blasting demolition construction is an efficient technical method.Based on the blasting project of Balitai Station of Tianjin Metro Line 7,the displacement change and vibration propagation law of the subway station and surrounding buildings are studied and analyzed by numerical simulation and field monitoring.MIDAS/GTS-NX finite element software is used to build a 3D model and the accuracy of the model is verified by on-site monitoring data.The result shows that blasting vibration velocity basically matches the simulation results at the monitoring points and both meet the safety specifications;The blasting vibration spreads rapidly outwards from the center of the blast holes.After reaching the peak,it gradually decays and the vibration velocity decreases to about 2 cm/s beyond 10 m.

关 键 词：地连墙 爆破拆除 数值模拟 振动分析 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]