Influences of Blasting Sequence on the Vibration Velocity of Surface Particles: A Case Study of Qingdao Metro, China

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• 作者：He Ma ; Hailiang Wang ; Chuang He ; Zuyuan Zhang…
• 关键词：Subway ; Blasting sequence ; Vibration velocity ; Ejective direction ; Blasting cavity
• 刊名：Geotechnical and Geological Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：35
• 期：1
• 页码：485-492
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Terrestrial Pollution; Waste Management/Waste Technology; Civil Engineering;
• 出版者：Springer International Publishing
• ISSN：1573-1529
• 卷排序：35

文摘

Taking the no.1 air channel of Yan’an road station, no.2 Line of Qingdao Metro, China, as an example, this paper began with the monitoring of vibration velocities of surface particles after the blasting of auxiliary holes, and obtained the influences of blasting cavity on the vibration responses of buildings. We then proposed the reasonable blasting sequence to excavate the shallow and large section tunnels going alongside buildings. Results showed that the existing blasting cavity had good ability of vibration isolation. When blasting at one side of blasting cavity, the vibration velocity at the blasting side was larger than that at the other side. The largest vibration velocity of surface particles was located at 2.0 m ahead the excavating face. This research can provide the basis for the blasting design of subway and tunnel excavations.