PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces

Tunnel blast-induced vibration probably causes damage to the rock mass surrounding the tunnel surface and also to the rock mass of the slope at the tunnel entrance. It is important to simultaneously monitor the vibration on the tunnel surface and on the tunnel entrance slope face, especially when th...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Zeming Wang, Jianhua Yang, Ting Zhang, Chi Yao, Xiaobo Zhang, Ping Gu
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/669cd73bca0c4afc8bb873266574566f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:669cd73bca0c4afc8bb873266574566f
record_format	dspace
spelling	oai:doaj.org-article:669cd73bca0c4afc8bb873266574566f2021-11-15T01:19:46ZPPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces1875-920310.1155/2021/5527115https://doaj.org/article/669cd73bca0c4afc8bb873266574566f2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/5527115https://doaj.org/toc/1875-9203Tunnel blast-induced vibration probably causes damage to the rock mass surrounding the tunnel surface and also to the rock mass of the slope at the tunnel entrance. It is important to simultaneously monitor the vibration on the tunnel surface and on the tunnel entrance slope face, especially when the blasting work face is close to tunnel entrance. During blasting excavation of the traffic tunnel at Baihetan hydropower station, vibration monitors were installed both on the tunnel surface and on the tunnel entrance slope face. Based on the monitoring data, a comparative study is conducted on the peak particle velocity (PPV) and frequency characteristics of the vibrations at these two locations. A three-dimensional FEM simulation of the tunnel blast is then performed to verify the field test results. The field monitoring and the numerical simulation show that there is significant difference between the vibration on the tunnel surface and that on the tunnel entrance slope face. The vibration on the tunnel surface has greater PPV and faster attenuation, while the tunnel entrance slope face has higher frequency and faster reduction rate in the center frequency. These differences are attributed to the different wave types and wave propagation paths. The tunnel surface is mainly surface waves transmitted through the damaged rock mass around the tunnel profile, while the tunnel entrance slope face originates mainly from the body waves transmitted via the undamaged rock mass inside the mountain. The comparisons of the monitored vibrations with the velocity limits specified in the Chinese standard show that the most dangerous vibration that may exceed the limit occurs on the tunnel surface. Therefore, the maximum charge weight used in the tunnel blast is determined by the vibration on the tunnel surface. Under different control standards, the allowable maximum charge weight per delay is further discussed.Zeming WangJianhua YangTing ZhangChi YaoXiaobo ZhangPing GuHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Zeming Wang Jianhua Yang Ting Zhang Chi Yao Xiaobo Zhang Ping Gu PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
description	Tunnel blast-induced vibration probably causes damage to the rock mass surrounding the tunnel surface and also to the rock mass of the slope at the tunnel entrance. It is important to simultaneously monitor the vibration on the tunnel surface and on the tunnel entrance slope face, especially when the blasting work face is close to tunnel entrance. During blasting excavation of the traffic tunnel at Baihetan hydropower station, vibration monitors were installed both on the tunnel surface and on the tunnel entrance slope face. Based on the monitoring data, a comparative study is conducted on the peak particle velocity (PPV) and frequency characteristics of the vibrations at these two locations. A three-dimensional FEM simulation of the tunnel blast is then performed to verify the field test results. The field monitoring and the numerical simulation show that there is significant difference between the vibration on the tunnel surface and that on the tunnel entrance slope face. The vibration on the tunnel surface has greater PPV and faster attenuation, while the tunnel entrance slope face has higher frequency and faster reduction rate in the center frequency. These differences are attributed to the different wave types and wave propagation paths. The tunnel surface is mainly surface waves transmitted through the damaged rock mass around the tunnel profile, while the tunnel entrance slope face originates mainly from the body waves transmitted via the undamaged rock mass inside the mountain. The comparisons of the monitored vibrations with the velocity limits specified in the Chinese standard show that the most dangerous vibration that may exceed the limit occurs on the tunnel surface. Therefore, the maximum charge weight used in the tunnel blast is determined by the vibration on the tunnel surface. Under different control standards, the allowable maximum charge weight per delay is further discussed.
format	article
author	Zeming Wang Jianhua Yang Ting Zhang Chi Yao Xiaobo Zhang Ping Gu
author_facet	Zeming Wang Jianhua Yang Ting Zhang Chi Yao Xiaobo Zhang Ping Gu
author_sort	Zeming Wang
title	PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
title_short	PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
title_full	PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
title_fullStr	PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
title_full_unstemmed	PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces
title_sort	ppv and frequency characteristics of tunnel blast-induced vibrations on tunnel surfaces and tunnel entrance slope faces
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/669cd73bca0c4afc8bb873266574566f
work_keys_str_mv	AT zemingwang ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces AT jianhuayang ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces AT tingzhang ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces AT chiyao ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces AT xiaobozhang ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces AT pinggu ppvandfrequencycharacteristicsoftunnelblastinducedvibrationsontunnelsurfacesandtunnelentranceslopefaces
_version_	1718428926469996544

PPV and Frequency Characteristics of Tunnel Blast-Induced Vibrations on Tunnel Surfaces and Tunnel Entrance Slope Faces

Ejemplares similares