An improved tunnel blast simulation method and its verification
LUO Chi1,2，YANG Xinan1,2,LUO Duhao3 ,ZHANG Haiqing4
1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804, China；
2.College of Transportation Engineering, Tongji University,Shanghai 201804, China；
3. The Fourth Company of China Railway NO.5 Engineering Group Co., LTD., Shaoguan 512031, China；
4.School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
Abstract：In order to predict and analyze effects of tunnel blast vibration on adjacent structures, numerical simulation of tunnel blast is necessary.Here, based on the tunnel blast feature of many blast holes being initiated simultaneously,aiming at spatial distribution of blast load and blast shock wave attenuation law considering multi-hole blast load superposition and differences of stress attenuation indexes in different blast areas, an improved tunnel blast simulation method was proposed to make numerical simulation as close as possible to the actual engineering situation.Vibration monitoring was conducted for the first step blast engineering of large-span transition section of Beijing-Zhangjiakou high speed railway’s Badaling Great Wall Station to analyze effects of blast vibration on blast side of the 8th branch tunnel.The measured data were compared with the simulation results using the improved tunnel blast simulation method.Through this study,it was shown that an improved tunnel blast simulation method is introduced,and its correctness is verified with actual measured data;it can provide a certain reference and guide for future blast numerical simulation of tunnel construction.
罗驰1,2，杨新安1,2，罗都颢3，张海清4. 一种改进型隧道爆破模拟方法及其验证分析[J]. 振动与冲击, 2019, 38(17): 260-267.
LUO Chi1,2，YANG Xinan1,2,LUO Duhao3,ZHANG Haiqing4. An improved tunnel blast simulation method and its verification. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(17): 260-267.
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