Analysis of the Influence of Tunnel Blasting Construction on Initial Concrete

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	Analysis of the Influence of Tunnel Blasting Construction on Initial Concrete
	Tang, Xianxi1 ; Xia, Dingding 1; Li, Danhe 2; Wang, Yaowu1
	2022
发表期刊	Journal of Railway Engineering Society
ISSN	1006-2106
卷号	39 期号:1 页码:73-78 and 113
摘要	Research purposes: Relying on the Shenjiaba No. 1 tunnel of the Chengdu-Kunming railway double line, this paper establishes an experiment on the damage of the initial concrete when the tunnel is drilled and blasted, to analyze the damage of the initial concrete by comprehensive experiments and numerical values. The model is calculated to obtain the safe vibration velocity threshold of the initial concrete to ensure the safety and reliability of the initial concrete during tunnel construction. Research conclusions:(1) The blasting vibration monitoring test is carried out in Shenjiaba No.1 tunnel. The Sadovsky empirical formula is analyzed by regression analysis. Combined with the numerical model of tunnel construction, the obtained results are compared with the calculated results of Sadovsky empirical formula, and the Sadovsky empirical formula of combined vibration speed is corrected to v=78×(Q1/3/R)1.38. (2) Taking C25 initially supported concrete used in site construction as the object, the damage experiment of initially supported concrete under blasting is carried out, the damage value of concrete at different ages is measured, and the safe vibration velocity threshold of concrete at different ages is obtained. (3) The technical parameters of the initial concrete from this paper have guiding significance for other similar projects. © 2022, Editorial Department of Journal of Railway Engineering Society. All right reserved.
关键词	Blasting Railroad tunnels Regression analysis Vibration analysis Blasting construction Blasting vibrations Different ages Empirical formulas Initial concrete Safe step distance Tunnel construction Tunnel engineering Velocity threshold Vibration velocity
收录类别	EI
语种	中文
出版者	Editorial Department of Journal of Railway Engineering Society
EI入藏号	20221411918491
EI主题词	Concretes
EI分类号	401.2 Tunnels and Tunneling ; 412 Concrete ; 922.2 Mathematical Statistics
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/157927
专题	土木工程学院
作者单位	1.Lanzhou University of Technology, Lanzhou; 730050, China; 2.China Railway 21st Bureau Group Second Engineering Co. Ltd, Lanzhou; 730000, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Tang, Xianxi,Xia, Dingding,Li, Danhe,et al. Analysis of the Influence of Tunnel Blasting Construction on Initial Concrete[J]. Journal of Railway Engineering Society,2022,39(1):73-78 and 113.
APA	Tang, Xianxi,Xia, Dingding,Li, Danhe,&Wang, Yaowu.(2022).Analysis of the Influence of Tunnel Blasting Construction on Initial Concrete.Journal of Railway Engineering Society,39(1),73-78 and 113.
MLA	Tang, Xianxi,et al."Analysis of the Influence of Tunnel Blasting Construction on Initial Concrete".Journal of Railway Engineering Society 39.1(2022):73-78 and 113.