[1]谢全民①,黄小武②,赵东华①,等.地铁隧道爆破振动测试及时频特征分析[J].爆破器材,2020,49(06):48-53.[doi:doi:10.3969/j.issn.1001-8352.2020.06.009]
　XIE Quanmin,HUANG Xiaowu,ZHAO Donghua,et al.Analysis of Time-Frequency Characteristics in Blasting Vibration Test of Subway Tunnel[J].EXPLOSIVE MATERIALS,2020,49(06):48-53.[doi:doi:10.3969/j.issn.1001-8352.2020.06.009]
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地铁隧道爆破振动测试及时频特征分析()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
49
期数:
2020年06
页码:
48-53
栏目:
爆破技术
出版日期:
2020-12-02

文章信息/Info

Title:
Analysis of Time-Frequency Characteristics in Blasting Vibration Test of Subway Tunnel
文章编号:
5482
作者:
谢全民①; 黄小武②; 赵东华①; 年鑫喆③
①陆军工程大学军械士官学校（湖北武汉，430075）
②武汉科技大学理学院（湖北武汉，430065）
③陕西中爆检测检验有限责任公司（陕西西安，710065)
Author(s):
XIE Quanmin①;  HUANG Xiaowu②;  ZHAO Donghua①;  NIAN Xinzhe③
①Ordnance NCO Academy, Army Engineering University (Hubei Wuhan, 430075)
②College of Science, Wuhan University of Science and Technology (Hubei Wuhan, 430065)
③Shaanxi China Blasting Inspection Co., Ltd. (Shaanxi Xi’an, 710065)
关键词:
地铁隧道; 爆破振动; 时频特征; 频率切片小波
Keywords:
subway tunnel;  blasting vibration;  time-frequency characteristics;  frequency slice wavelet
分类号:
TD235.1
DOI:
doi:10.3969/j.issn.1001-8352.2020.06.009
文献标志码:
A
摘要:
为确保某市地铁隧道安全、高效地爆破开挖，采用网络测振仪测试了隧道掘进爆破时周边建(构)筑物的爆破振速。基于频率切片小波变换开展时频特征分析，首先得到了测振信号的全频带时频分布特征，进而通过5个主成分频率切片区间更进一步精确提取了爆破振动信号时域、频域分布特征，并得到了相应频带内的爆破振动重构分量。实测数据时频特征分析表明，频率切片小波变换具备独特的信号分析优势，适用于地铁爆破振动信号时频特征提取；此次地铁隧道钻爆法开挖产生的质点峰值振速在0.07～0.85 cm/s之间，主频在13.3～68.9 Hz之间，爆破振速处于《爆破安全规程》规定的安全阈值范围内，爆破方案基本合理。
Abstract:
To ensure safe and efficient blasting excavation of subway tunnel in a city, vibration velocity of surrounding buildings (structures) during tunnel excavation blasting was measured by network vibration meter. Time-frequency characteristic analysis based on frequency slice wavelet transform was carried out to obtain distribution characteristics of vibration signal for the whole band. Then, the time-domain and frequency-domain distribution characteristics of the blasting vibration signal were further accurately extracted through the main component frequency slice interval, and the reconstruction components of the blasting vibration in the corresponding frequency band were obtained. Time-frequency characteristic analysis of the measured data shows that the frequency slice wavelet transform has unique signal analysis advantages and is suitable for the extraction of the time-frequency characteristic of the blasting vibration signal of the subway. The particles produced by drilling and blasting excavation of subway tunnel are featured by a peak vibration velocity within the range of 0.07-0.85 cm/s, a main frequency among 13.3-68.9 Hz, and a blasting vibration in conformance to the safety threshold specified in Blasting Safety Regulations. The blasting scheme is basically reasonable.

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备注/Memo

备注/Memo:
收稿日期：2020-05-14
基金项目：国家自然科学基金资助项目(51808554)；湖北省重点研发计划项目（2020BCA084）；国铁集团科技研究开发计划项目（K2019G056）
第一作者：谢全民(1983－)，男，博士，讲师，主要从事爆破理论及爆破安全方面的科研工作。E-mail:xqmblast@163.com
更新日期/Last Update: 2020-12-02