Field experiment on blasting vibration effect of underpass gas pipelines

被引：0

作者：

Zhu B. ^{[1
]}

Jiang N. ^{[1
]}

Jia Y. ^{[2
,3
]}

Zhou C. ^{[1
]}

Luo X. ^{[1
]}

Wu T. ^{[1
]}

机构：

[1] Faculty of Engineering, China University of Geosciences, Wuhan, 430074, Hubei

[2] Hubei Key Laboratory of Blasting Engineering, Wuhan, 430024, Hubei

[3] Wuhan Explosion and Blasting Co., Ltd., Wuhan, 430024, Hubei

来源：

Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2019年 / 38卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Blasting engineering; Blasting vibration; Dynamic strain; Gas pipeline; Peak vibration velocity; Vibration frequency;

D O I：

10.13722/j.cnki.jrme.2019.0183

中图分类号：

学科分类号：

摘要：

Making clear the vibration effect ofthe gas pipeline due toblasting helps to better predict and control blasting hazards. Blasting test of buried gas pipelines was carried out by using dynamic monitoring measures, the propagation characteristics of blasting seismic waves during blasting were analyzed based on the blasting strain and stress wave theory. The vibration and strain characteristics of both the pipeline and the soil above the pipeline were studied, and the allowable strain of the pipeline and the surface safety control speed were calculated. The research indicates that the experimental blasting seismic wave has short-term randomness, and that the main frequency of vibration mainly rangesfrom10Hz to 50Hz and attenuates fast, which conforms to the propagation law of the blasting seismic wave in the far area of actual blasting engineering and hence shows the reasonability of the test design. The cross section of the pipe center is most dangerous, in which the peak strain of the measurement point is mainly the axial peak tensile strain. The peak tensile strain on the back side of the section is larger than that on the explosion side, and the vibration velocity of the pipeline is greater than the surface vibration velocity. The allowable strain value of the pipeline is 366.4×10-6and the surface safety control velocity above the pipeline is 8.5cm/s. © 2019, Science Press. All right reserved.

引用

页码：2582 / 2592

页数：10

共 21 条

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