Research on the Vibration Field in Tunnel Blasting Excavation
Based on the theory and research of linear charge, the necessity of the utility of the linear charge to the research of the vibration of tunnel blasting was proposed. The vibration of single linear charge with one free face was firstly simulated. Then, the vibration of the full section tunnel blasting was also simulated. From the results of simulation, the free face makes the maximum vibration value offset from the middle of the linear charge to direction of the bottom of the hole. The shape of the vibration field of single linear charge with one flee face was not cylindrical. However, the vibration field of runnel blasting had the almost the same shape with the single linear charge blasting in infinite field, which was verified by the existing results of stress field of full section tunnel blasting. So, the modified scaling law and attenuation law were proposed to prediction the PPV of panicle. The results of this paper have some guide effects to the excavation of tunnel, especially the subsea tunnel.
tunnel engineering vibration field numerical simulation subsea tunnel linear charge free face
LIU Yongsheng FU Hongxian WANG Mengshu LI Pengfei GAO Baobin
Tunnel and Underground Engineering Research Center of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
2244-2248
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）