市政技术2024，Vol.42Issue(9)：112-120,9.DOI:10.19922/j.1009-7767.2024.09.112
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
摘要
Abstract
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Key words
diaphragm wall/blasting demolition/numerical simulation/vibration analysis分类
交通工程引用本文复制引用
孙森,张东明,高志轩,康飞,周亚东..既有地铁车站地连墙爆破拆除施工振动分析[J].市政技术,2024,42(9):112-120,9.基金项目
天津市自然科学基金重点资助项目(18JCZDJC10010) （18JCZDJC10010）
