郑炳旭,傅建秋,王永庆,唐涛,钟伟平
ZHENG Bing-xu~1,FU Jian-qiu~(1,2),WANG Yong-qing~1,TANG Tao~1,ZHONG Wei-ping~1(1.Hongda Blasting Engineering Co Ltd of Guangdong Province,Guangzhou 510055,China;2.University of Science and Technology Beijing,Beijing 100083,China)

• 1:广东省宏大爆破工程有限公司
• 2:广东省宏大爆破工程有限公司
• 3:广东省宏大爆破工程有限公司
• 4:广东省宏大爆破工程有限公司

摘要(Abstract)：

在倒塌场地狭小的条件下,采用双向折叠定向爆破的方法成功地拆除了150m高的钢筋混凝土烟囱。文中讨论了上、下爆破切口形状、位置和参数的选择,根据以往对两个120m烟囱倾倒过程图像资料的分析,确定了上、下爆破切口起爆时差。通过设置缓冲层和竹排栅,减小了烟囱触地震动,并控制了飞石和飞溅物。由于所选择的上、下爆破切口起爆时差过长,上段烟囱下坐时间为4 39s。
In the condition of narrow area for collapsing of the chimney,a reinforced concrete chimney with a height of 150meters was successfully demolished by bi-directional folding blasting.In this paper,selection of the shape,position and parameters of upper and down blasting cuts was discussed.Based on analyzing previous image materials about collapsing process of two chimneys with a height of 120 meters,the delayed timing of the down cut relative to the upper cut was determined.By the set-up of buffering dams and bamboo barriers,touchdown vibration of the chimney was reduced,and the flying rocks and spattering substances were under control.Due to overlong delayed timing of the down cut,the down-sitting of the upper chimney section was for 4.39 seconds.

关键词(KeyWords)： 烟囱;双向折叠;定向爆破;拆除爆破;安全措施
Chimney; Bidirectional folding; Directional blasting; Demolition blasting; Safety precautions

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 郑炳旭,傅建秋,王永庆,唐涛,钟伟平
ZHENG Bing-xu~1,FU Jian-qiu~(1,2),WANG Yong-qing~1,TANG Tao~1,ZHONG Wei-ping~1(1.Hongda Blasting Engineering Co Ltd of Guangdong Province,Guangzhou 510055,China;2.University of Science and Technology Beijing,Beijing 100083,China)

参考文献(References)：

• 〔1〕付建秋,高金石,唐　涛 120m钢筋混凝土烟囱背部断裂及倾倒过程的观测分析[A] 工程爆破文集(第六辑)[C] 深圳:海天出版社,1997
• 〔2〕郑炳旭,高金石,卢史林 120m钢筋混凝土烟囱定向倒塌爆破拆除[A] 工程爆破文集(第六辑)[C] 深圳:海天出版社,1997
• 〔3〕潘常洪,鹿智勇 鞍钢第二发电厂120m钢筋混凝土烟囱爆破拆除[J] 工程爆破,2002 8(2):20-22