Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys
Aiming at the problem of displacement of collapse direction caused by the impact of the high-rise reinforced concrete chimney in the process of blasting demolition, combined with the monitoring methods such as high-speed photography observation, piezoelectric ceramic sensor, and blasting vibration m...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/13/6240 |
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| author | Xiaowu Huang Xianqi Xie Jinshan Sun Dongwang Zhong Yingkang Yao Shengwu Tu |
| author_facet | Xiaowu Huang Xianqi Xie Jinshan Sun Dongwang Zhong Yingkang Yao Shengwu Tu |
| author_sort | Xiaowu Huang |
| collection | DOAJ |
| description | Aiming at the problem of displacement of collapse direction caused by the impact of the high-rise reinforced concrete chimney in the process of blasting demolition, combined with the monitoring methods such as high-speed photography observation, piezoelectric ceramic sensor, and blasting vibration monitor, the impact process of the 180 m high chimney was comprehensively analyzed. The results show that the chimney will experience multiple ‘weight loss’ and ‘overweight’ effects during the sit-down process, inducing compressive stress waves in the chimney. When the sit-down displacement is large, the broken reinforced concrete at the bottom can play a significant buffering effect, and the ‘overweight’ effect gradually weakens until the sit-down stops. The stress of the inner and outer sides of the chimney wall is obviously different in the process of collapsing and touching the ground. The waveform of the monitoring point of the piezoelectric ceramic sensor is divided into three stages, which specifically characterizes the evolution process of the explosion load and the impact of the chimney. The vibration induced by explosive explosion is mainly high-frequency vibration above 50 Hz, the vibration induced by chimney collapse is mainly low-frequency vibration below 10 Hz, and the vibration characteristics are obviously different. In the process of blasting demolition and collapse of high-rise reinforced concrete chimney, due to the impact of sitting down, the wall of the support tube is subjected to uneven force, resulting in the deviation of the collapse direction. In practical engineering, the control measures of chimney impact, blasting vibration, and collapse touchdown vibration should be fully strengthened to ensure the safety of the protection target around the blasting demolition object. |
| first_indexed | 2024-03-11T01:28:43Z |
| format | Article |
| id | doaj.art-c1e4bc8e0c844559bb93ca6469582381 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:28:43Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c1e4bc8e0c844559bb93ca64695823812023-11-18T17:32:41ZengMDPI AGSensors1424-82202023-07-012313624010.3390/s23136240Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete ChimneysXiaowu Huang0Xianqi Xie1Jinshan Sun2Dongwang Zhong3Yingkang Yao4Shengwu Tu5College of Science, Wuhan University of Science and Technology, Wuhan 430065, ChinaCollege of Science, Wuhan University of Science and Technology, Wuhan 430065, ChinaState Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, ChinaCollege of Science, Wuhan University of Science and Technology, Wuhan 430065, ChinaState Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, ChinaCollege of Science, Wuhan University of Science and Technology, Wuhan 430065, ChinaAiming at the problem of displacement of collapse direction caused by the impact of the high-rise reinforced concrete chimney in the process of blasting demolition, combined with the monitoring methods such as high-speed photography observation, piezoelectric ceramic sensor, and blasting vibration monitor, the impact process of the 180 m high chimney was comprehensively analyzed. The results show that the chimney will experience multiple ‘weight loss’ and ‘overweight’ effects during the sit-down process, inducing compressive stress waves in the chimney. When the sit-down displacement is large, the broken reinforced concrete at the bottom can play a significant buffering effect, and the ‘overweight’ effect gradually weakens until the sit-down stops. The stress of the inner and outer sides of the chimney wall is obviously different in the process of collapsing and touching the ground. The waveform of the monitoring point of the piezoelectric ceramic sensor is divided into three stages, which specifically characterizes the evolution process of the explosion load and the impact of the chimney. The vibration induced by explosive explosion is mainly high-frequency vibration above 50 Hz, the vibration induced by chimney collapse is mainly low-frequency vibration below 10 Hz, and the vibration characteristics are obviously different. In the process of blasting demolition and collapse of high-rise reinforced concrete chimney, due to the impact of sitting down, the wall of the support tube is subjected to uneven force, resulting in the deviation of the collapse direction. In practical engineering, the control measures of chimney impact, blasting vibration, and collapse touchdown vibration should be fully strengthened to ensure the safety of the protection target around the blasting demolition object.https://www.mdpi.com/1424-8220/23/13/6240reinforced concrete chimneyblasting demolitiontest monitoringdynamic responsesecurity control |
| spellingShingle | Xiaowu Huang Xianqi Xie Jinshan Sun Dongwang Zhong Yingkang Yao Shengwu Tu Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys Sensors reinforced concrete chimney blasting demolition test monitoring dynamic response security control |
| title | Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys |
| title_full | Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys |
| title_fullStr | Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys |
| title_full_unstemmed | Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys |
| title_short | Monitoring and Analysis of the Collapse Process in Blasting Demolition of Tall Reinforced Concrete Chimneys |
| title_sort | monitoring and analysis of the collapse process in blasting demolition of tall reinforced concrete chimneys |
| topic | reinforced concrete chimney blasting demolition test monitoring dynamic response security control |
| url | https://www.mdpi.com/1424-8220/23/13/6240 |
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