SAFETY EVALUATION AND MONITORING OF BLASTING EXCAVATION FOR TUNNELS WITH CHANGING SPACE

摘要：

Based on the problem of blasting vibration influence on close-spaced tunnel, the monitoring way, dynamic characteristics and controlling study on blasting vibration induced by close-spaced tunnel excavation are studied for Qishucao diverging tunnel. Via analysis of the peak velocity and its main frequency of concrete lining and revised mathematical model of propagation for blasting seismic wave through regression analysis for the results of monitoring on blasting vibration, longitudinal attenuation of maximal vibration velocity, the dominating vibration frequency of concrete lining, vibration velocity distribution of cross section and vibration near the excavation face are presented. Focused on the near-blast side vibration of close-spaced tunnel, the vibration reduction technology measures of close-spaced tunnel are put forward from the circle footage, millisecond vibration, undermine pattern and so on. Conclusions can offer helpful reference to blasting control design, blasting excavation and in-site monitoring of similar close-spaced tunnel.

作者: Li Liping Li Shucai Zhang Qingsong Wang Gang Li Liyan

作者单位: Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, 250061 China Geophysical Prospecting and Surveying Team, Anhui Bureau of Coal Geology, Suzhou, 234000 China

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）