Specifications for controlled blasting in civil engineering projects

Hendron, A J; Oriard, Lewis L.

doi:10.1016/0148-9062(75)90528-8

Cited by 6 publications

(5 citation statements)

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“…In 1972, A.J. Hendron [6], who first qualitative study analyzes the impact of tunnel blasting vibration on the floor of the building; R. Holmberg [7], who studied the tunnel blasting vibration, the vibration in the vertical particle, radial and tangential component 3 speed decay law; C.H. Dowding [8] wonderful combination of safety systems engineering approach, blasting vibration monitoring and control were studied.…”

Section: General Instructionsmentioning

confidence: 99%

Analysis of Vibration Characteristics of New Subway Tunnel Undercrossing the Existing Highway Under Blasting Construction

Hu¹,

Duan²

2017

dtmse

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During urban subway tunnel construction, the blasting inevitably has an impact on the ground structure. If it's energy is not controlled, the surface of existing structures would be easily causing damage. So, according to one subway tunnel undercrossing the existing highway, based on the numerical simulation, three different levels of surface orientation at distances of surface vibration velocity are obtained. And, the propagation and characteristics of vibration are investigated under the effect of blasting vibration velocity control measures.

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Section: General Instructionsmentioning

confidence: 99%

Analysis of Vibration Characteristics of New Subway Tunnel Undercrossing the Existing Highway Under Blasting Construction

Hu¹,

Duan²

2017

dtmse

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“…The attenuation relationship for the longitudinal and vertical motions at this site are given in Figure 11. The assumption of simultaneity of shots detonated at or within 8 ms intervals is compared well with the upper bound of experience (Hendron and Oriard, 1972 ). These scaled distances or the peak particle velocity at the instrumented house were employed to identify the shot pairs to compare differences in ground motions, structural response or crack response.…”

Section: Influence Of Blast Designmentioning

confidence: 99%

Effect of blast design on crack response

Dowding¹,

Aimone-Martin²,

Snider³

2003

Explosives and Blasting Technique

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This case history describes the instrumentation of a house near an aggregate quarry to assess the effect of changes in blast design on the house response. Velocity response was measured for the superstructure as well as walls and ceilings. Micrometer response of three cracks was measured as well. In all some 11 velocity transducers and 3 crack sensors measured excitation and response for each blast. Dynamic response of these cracks was compared to various measures of ground and/or structure motion to determine those with the best correlation. Variations in the ground motion and air pressure wave (air blast) reflected changes in the blast design. In addition dynamic crack response was compared to the long-term, weather induced crack response as well as the changes in temperature and humidity that produced the response. The study confirms the domination of long-term, weather induced crack response compared to the dynamic response produced by blast-induced phenomena.

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“…At present, a lot of research has been done on the propagation law of tunnel blasting vibration. Many researchers [7][8][9][10][11][12][13] have also improved the empirical formula of blasting vibration attenuation, which provides a solid theoretical basis for the study of blasting vibration propagation law. On the basis of on-site monitoring, Yang et al [14], Jiang et al [15], Jiang et al [16], Rao [17], and Meng [18] used Sadov's empirical formula to regress the blasting vibration velocity and then studied the vibration velocity attenuation law caused by blasting vibration.…”

Section: Introductionmentioning

confidence: 99%

Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel

Chen

Luo

et al. 2020

Advances in Civil Engineering

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In order to study the propagation laws of blasting vibration waves in weak rock tunnels, the longitudinal and circumferential blasting vibration tests in Muzhailing Tunnel were carried out, and the measured data were analyzed and studied using the methods of Sadov’s nonlinear regression, Fourier transform, and Hilbert–Huang transform (HHT) to provide a reference for the optimization of blasting design of Muzhailing Tunnel or similar weak rock tunnels. The results showed that the tangential main frequency decreases rapidly and the radial main frequency decreases slowly with the increase of proportionate charge quantity. Under a certain charge quantity, as the distance from the explosion source increases, the spectrum width of the blasting vibration frequency becomes narrower, the overall energy is more concentrated, and the vibration frequency tends to be closer to the low frequency. At a certain distance from the explosive source, the frequency of blasting vibration decreases gradually, and the amplitude of low-frequency region increases with the increase of charge quantity. The vibration velocity on the left side of the tunnel is larger than that on the right side, and the vibration velocity at the vault and the arch foot of lower bench decreases rapidly, while the vibration velocity at the arch feet of upper bench and middle bench decreases slowly. The vibration frequencies of the left arch foot of the middle bench and the right arch foot of the upper bench are higher than those of other positions, while the frequencies of the left arch foot of the upper bench are the lowest. During tunnel blasting, the energy input to the strata media is mainly concentrated in the stage of the blasting of the cut hole. The blasting has more energy input to the left arch foot of the upper bench and the tunnel vault, which is consistent with the conclusion of frequency analysis.

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Specifications for controlled blasting in civil engineering projects

Cited by 6 publications

References 0 publications

Analysis of Vibration Characteristics of New Subway Tunnel Undercrossing the Existing Highway Under Blasting Construction

Analysis of Vibration Characteristics of New Subway Tunnel Undercrossing the Existing Highway Under Blasting Construction

Effect of blast design on crack response

Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel

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