| 120 m高钢内筒钢混烟囱爆破拆除技术 |
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| 引用本文： | 李飞,孙飞,顾云,刘迪,刘勤杰,刘新. 120 m高钢内筒钢混烟囱爆破拆除技术[J]. 爆破器材, 2021, 50(3): 45-50. DOI: 10.3969/j.issn.1001-8352.2021.03.009 |
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| 作者姓名： | 李飞 孙飞 顾云 刘迪 刘勤杰 刘新 |
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| 作者单位： | 核工业南京建设集团有限公司（江苏南京，211102） |
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| 摘 要： | 在120 m高钢内筒钢筋混凝土烟囱的爆破拆除中，综合考虑工程环境、自身结构特征、安全作业等因素，采用了底部爆破、定向倒塌的控制爆破方案。钢内筒预处理过程中，为确保底部切口预切除后钢内筒的稳定性及烟囱倒塌过程中钢筋混凝土筒体与钢内筒的整体性，在首层检修平台切口侧对称设置4道6股φ10 mm的钢丝绳对钢内筒进行约束。爆破过程中，烟囱按预定方向顺利倒塌，各危害效应均控制在安全范围内，未出现异常情况，达到了预期的爆破效果。其经验可为类似爆破工程提供参考。
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| 关 键 词： | 钢内筒钢混烟囱 预处理 定向爆破 |
Blasting Demolition and Pretreatment Technology of a 120 m High Reinforced Concrete Chimney with Steel Inner Cylinder |
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| LI Fei,SUN Fei,GU Yun,LIU Di,LIU Qinjie,LIU Xin. Blasting Demolition and Pretreatment Technology of a 120 m High Reinforced Concrete Chimney with Steel Inner Cylinder[J]. Explosive Materials, 2021, 50(3): 45-50. DOI: 10.3969/j.issn.1001-8352.2021.03.009 |
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| Authors: | LI Fei SUN Fei GU Yun LIU Di LIU Qinjie LIU Xin |
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| Affiliation: | Nuclear Industry Nanjing Construction Group Co., Ltd. (Jiangsu Nanjing, 211102) |
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| Abstract: | Aiming at the controlled blasting demolition of a 120 m high reinforced concrete chimney with inner steel cylinder, the controlled blasting scheme of directional collapse by bottom blasting was adopted considering the engineering environment, its own structural characteristics, safe operation and other factors. In order to ensure the stability of the steel inner cylinder after the pre resection of bottom incision and the integrity of the reinforced concrete cylinder and the steel inner cylinder during the collapse of the chimney, four 6-strands steel wire ropes with diameter of 10 mm were symmetrically set on the incision side of the maintenance platform at the first floor to constrain the steel inner cylinder. In the process of blasting, the chimney collapsed smoothly according to the predetermined direction, and each hazard effect was controlled within the safe range without any abnormal situation. The expected blasting effect was achieved, and the experience can provide reference for similar blasting projects. |
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| Keywords: | reinforced concrete chimney with steel inner cylinder pretreatment directional blasting |
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