Technical gazette, Vol. 27 No. 3, 2020.
Original scientific paper
https://doi.org/10.17559/TV-20200225022727
Analysis of Vibration Attenuation and Energy Consumption of Blasting Demolition Chimney: A Case Study
Shuren Wang
orcid.org/0000-0001-5490-2825
; International Joint Research Laboratory of Henan Province for Underground, Space Development and Disaster Prevention, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Jiyun Zhang
; School of Civil Engineering, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Jingtao Li
; School of Civil Engineering, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Fuli Kong
; Institute of National Defense Engineering, Academy of Military Sciences, No. 3 Xishan Road, Luoyang, Henan Province, 471023, China
Junqi Fan
; Institute of National Defense Engineering, Academy of Military Sciences, No. 3 Xishan Road, Luoyang, Henan Province, 471023, China
Abstract
Demolishing a tall chimney by directional blasting can save time and cost. However, the blasting vibration and the touchdown vibration of the parts of the chimney falling to the ground will cause noise disturbance to the local residents. To reduce the vibration effect of blasting demolition of the chimney, taking the 180 m high chimney in Jiaozuo, China, as the engineering background, the loose accumulation body with a right-angled trapezoid section 3-6 m thick was piled with three kinds of graded gravel particles as the buffer layer. According to the site restrictions, the chimney was demolished by directional blasting in two stages. The vibration propagation and attenuation rules of the blasting demolition of the chimney were analyzed and touchdown vibrations of two parts of the chimney were monitored also. Results show that the low frequency vibrations generated by the blasting and chimney touchdown have a greater impact on the surrounding environment. The vibration velocity and energy attenuation represent a form of power function. With the increase of the number of chimney touchdowns, the energy absorption rate of the loose accumulation body becomes lower. The obtained conclusions in this study can provide a reference for the similar blasting demolition practice.
Keywords
blasting demolition; chimney; gravel body; vibration velocity
Hrčak ID:
239091
URI
Publication date:
14.6.2020.
Visits: 1.923 *