A case study on the cavity effect of a water tunnel on the ground vibrations induced by excavating blasts

doi:10.1016/j.tust.2017.08.026

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	A case study on the cavity effect of a water tunnel on the ground vibrations induced by excavating blasts
	Xia, Xiang; Li, Haibo; Liu, Yaqun; Yu, Chong
刊名	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
	2018
卷号	71 页码:292-297
关键词	Cavity effect Tunnel Blast vibration PPV
ISSN号	0886-7798
DOI	10.1016/j.tust.2017.08.026
英文摘要	The cavity effect means the amplifications of blast vibrations when propagating through a cavity inside the rock mass. It has been investigated by a series of blast tests in an underground water tunnel. Monitoring points were set up in pairs on the ground surface and symmetrically about the tunnel face. The amplifying coefficient of blast vibrations was defined as the PPV (peak particle velocity) ratio of the two symmetry points. It is found that the amplifying coefficient first rises to a maximum of 3.5, and then falls down with the distance in the tunnel axial direction. Meanwhile, tunnel radius and its buried depth are two other influencing factors. The coefficient linearly increases with tunnel radius, while decreases with the depth in a power function. These results suggest that the cavity effect only works within a limited scope on the ground, and mainly occurs in shallow tunnel excavations. By introducing a ratio of the tunnel depth to its radius, an empirical formula was proposed to calculate the amplifying coefficient. It can be used to predict the PPV amplifications and therefore define a vibration control area for the safety of ground structures and facilities. It could also be applied to more site conditions by choosing appropriate parameter values in the formula.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000418212600026
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4184]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Xia, Xiang,Li, Haibo,Liu, Yaqun,et al. A case study on the cavity effect of a water tunnel on the ground vibrations induced by excavating blasts[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2018,71:292-297.
APA	Xia, Xiang,Li, Haibo,Liu, Yaqun,&Yu, Chong.(2018).A case study on the cavity effect of a water tunnel on the ground vibrations induced by excavating blasts.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,71,292-297.
MLA	Xia, Xiang,et al."A case study on the cavity effect of a water tunnel on the ground vibrations induced by excavating blasts".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 71(2018):292-297.