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Strategic Study of CAE >> 2014, Volume 16, Issue 11

Measurement and characteristics of ground vibration caused by blasting demolition of urban overpass

1. Institute of Engineering Mechanics,CEA,Harbin 150080 ,China;

2. College of Earth Science,University of Chinese Academy of Sciences,Beijing 100049 ,China

Funding project:中国地震局工程力学研究所基本科研业务专项资助项目(2011B02);国家国际科技合作专项资助项目(2012DFA70810);黑龙江省青年科学基金(QC2011C058);教育部留学回国人员科研启动基金资助项目 Received: 2014-04-07 Available online: 2014-11-21 13:32:15.000

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Abstract

To analyze the ground vibration caused by blasting demolition of urban overpass, in this paper we introduced the measurement method and then studied the characteristics of recorded ground vibrations. Through analysis of peak acceleration, peak frequency and duration, results indicate that, the vertical component of vibration is the most important in the region close to the collapse point; the collapse of bridge segments will lead to superposition of ground vibration, and isolation measures can reduce the peak acceleration but increase the duration of vibration; blasting and collapse vibration cause no damage to the reserved structure which indicates that blasting description is a safe and effective method.

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