文献类型：会议论文

英文题名：A case study of determining the safety threshold of blasting vibration for tunnel lining

作者：Xia, C. C.[1,2];Xue, F.[1,2];Gao, J. K.[3]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing, Zhejiang, Peoples R China;[2]Tongji Univ, Minist Educ China, Key Lab Geotech & Underground Engn, Shanghai, Peoples R China;[3]Zhejiang Commun Construct Grp Co Ltd, Hangzhou, Zhejiang, Peoples R China

会议论文集：3rd International Conference on Rock Dynamics and Applications (ROCDYN)

会议日期：JUN 26-27, 2018

会议地点：Trondheim, NORWAY

语种：英文

外文关键词：Blasting - Linings - Rocks

外文摘要：A method for determining the safety threshold of blasting vibration velocity is proposed, which is based on dynamic response calculating, monitoring analysis, and statistical relationship between the safety evaluation and the peak vibration velocity (PPV) before and after blasting. The simulation results show that the PPV in the blasting frontside is obviously larger than PPV in the blasting backside. The maximum calculated PPV is 10.7 cm/s, and it shows a significant decreasing trend with the increase of rock mass classification index. By comparing the PPV and crack alteration on the lining before and after blasting, it is recommends that the safety threshold should be 10 cm/s for intact lining or B-grade cracked lining and the V-classified surrounding rock tunnel. Alternatively, if the lining crack grade falls between 1 A and B, then the safety threshold of the III-classified and IV-classified surrounding rock tunnel are recommended as 5 cm/s and 6 cm/s, respectively.