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?10 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。
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.
作者
李飞
孙飞
顾云
刘迪
刘勤杰
刘新
LI Fei;SUN Fei;GU Yun;LIU Di;LIU Qinjie;LIU Xin(Nuclear Industry Nanjing Construction Group Co.,Ltd.,Jiangsu Nanjing,211102)
出处
《爆破器材》
CAS
CSCD
北大核心
2021年第3期45-50,共6页
Explosive Materials
关键词
钢内筒钢混烟囱
预处理
定向爆破
reinforced concrete chimney with steel inner cylinder
pretreatment
directional blasting
作者简介
第一作者:李飞(1980-),男,学士,爆破高级工程师,主要从事工程爆破。E-mail:1020403618@qq.com;通信作者:孙飞(1989-),男,硕士,工程师(采矿专业),研究方向为爆炸与毁伤作用机理研究及其应用。E-mail:1326662880@qq.com。
