Blasting vibration effect and safety evaluation method of railway cross tunnels

被引：9
|
作者：
Zhao, Yan [1 ,2 ,3 ,4 ]
Shan, RenLiang [2 ,3 ]
Wang, HaiLong [1 ,2 ,3 ]
机构：
[1] Hebei Univ Architecture, Zhangjiakou 075000, Hebei, Peoples R China
[2] China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China
[3] Hebei Prov Key Lab Civil Engn Diag Reconstruct & D, Zhangjiakou 075000, Hebei, Peoples R China
[4] Hebei Prov Green Bldg Collaborat Innovat Ctr, Zhangjiakou 075000, Hebei, Peoples R China
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2024年 / 145卷
基金：
中国国家自然科学基金;
关键词：
Cross tunnel; Blasting vibration response; Frequency effect; Quantitative analysis; On -site monitoring; Numerical simulation; FREQUENCY BAND; ROCK; STABILITY;
D O I：
10.1016/j.tust.2024.105588
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The evolution characteristics of the peak particle velocity and frequency of an existing railway cross tunnel are systematically studied. The analysis results show that there is a difference in the blasting vibration response before and after the new tunnel face is built. In this paper, a set of blasting vibration response evaluation methods that can quantitatively consider the influence of frequency by means of dimensional analysis is introduced. In addition, relevant knowledge on topics such as wavelet packet analysis, signal processing, structural dynamics, and explosion mechanics is applied to research the influence of the frequency. The research results show that the influence of the frequency on the blasting vibration response can be quantitatively analyzed by quantifying the dynamic amplification factor. To resolve the insufficiency of field monitoring, the distribution of the blasting vibration response along the entire section of the existing tunnel is studied through numerical simulation. Based on the theory of distortion energy in material mechanics, a new idea for evaluating the blasting vibration response of a cross tunnel is proposed.
引用
收藏
页数：21
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