热电厂取水泵房混凝土拱围堰拆除爆破振动监测
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摘要
四川华电珙县电厂混凝土拱围堰爆破拆除规模大,距离取水泵房建筑物较近,爆破拆除所诱发的爆破振动可能对取水泵房的安全产生不利影响。混凝土拱围堰爆破拆除采用了孔内分段、孔外接力的毫秒微差起爆网路,解决孔间、孔内的分段问题,减小爆破振动危害。在取水泵房拦污栅、闸墩、泵房基础和配电房基础等主要保护部位进行爆破振动监测,结果表明,在泵房某些部位爆破振动呈现一定的放大效应,并出现了振动叠加现象,实测得到的最大峰值质点振速为14.77cm/s,实测峰值质点振速均未超过建议的安全控制标准,取水泵房没有产生明显破坏。
In the explosion demolition of large-scale concrete arch cofferdam of power plant in China Huadian Corporation Sichuan Company in Gong county,the distance between explosion source and the pumping station was small.The safety of pumping station could be adversely affected by blasting vibration induced by cofferdam blasting demolition.Milliseconds delay blasting network of the sublevel interval charging inside the hole and relay ignition outside the hole was adopted in the blasting demolition of concrete arch cofferdam.The problem of decking charge between and inside the holes was solved and the blasting vibration damage was reduced.The blasting vibration monitoring was conducted in the main protection part of the pumping station such as trash rack,gate pier,pumping room basis and transformer room basis.The monitoring results show that the blasting vibration had a certain amplification effect in some parts of the pumping station.Some superposition phenomenon appeared in blasting vibration and the maximum peak particle vibration velocity was 14.77 cm/s,which was less than blasting vibration safety control standard and the pumping station had not been affected significantly.
In the explosion demolition of large-scale concrete arch cofferdam of power plant in China Huadian Corporation Sichuan Company in Gong county,the distance between explosion source and the pumping station was small.The safety of pumping station could be adversely affected by blasting vibration induced by cofferdam blasting demolition.Milliseconds delay blasting network of the sublevel interval charging inside the hole and relay ignition outside the hole was adopted in the blasting demolition of concrete arch cofferdam.The problem of decking charge between and inside the holes was solved and the blasting vibration damage was reduced.The blasting vibration monitoring was conducted in the main protection part of the pumping station such as trash rack,gate pier,pumping room basis and transformer room basis.The monitoring results show that the blasting vibration had a certain amplification effect in some parts of the pumping station.Some superposition phenomenon appeared in blasting vibration and the maximum peak particle vibration velocity was 14.77 cm/s,which was less than blasting vibration safety control standard and the pumping station had not been affected significantly.
引文
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[4]FAN Lei,QI Shi-fu.Directional blasting demolition of water tower in complicated environment[J].Blasting,2008,25(3):68-70.(in Chinese)
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[5]ZHAN Xue-jun,REN Xian-bin,ZHANG Xiao-ping.Toppling duration and vibration effect caused by blasting of hydraulic trestle pier[J].Journal of Yangtze River Scientific Research Institute,2012,29(7):41-44.(in Chinese)
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[7]张正宇,张文煊,吴新霞.现代水利水电工程爆破[M].北京:中国水利水电出版社,2003.
[8]李洪涛,舒大强,卢文波,等.建筑物对爆破振动中不同频率能量成分的响应特征[J].振动与冲击,2010,29(2):154-158.
[8]LI Hong-tao,SHU Da-qiang,LU Wen-bo,et al.Response characteristics of a structure to different frequency components in blasting vibration energy[J].Journal of Vibration and Shock,2010,29(2):154-158.(in Chinese)
[2]GB6722—2003爆破安全规程[S].北京:中国标准出版社,2004.
[3]李洪涛,朱传云,卢文波,等.白莲河水库第二溢洪道自溃坝爆破拆除振动安全监测[J].爆破,2006,23(3):78-84.
[3]LI Hong-tao,ZHU Chuan-yun,LU Wen-bo,et al.Vibration safety monitoring during demolition blasting of fuseplug dam in 2nd spillway of Bailianhe reservoir[J].Blasting,2006,23(3):78-84.(in Chinese)
[4]范磊,齐世福.复杂环境中水塔的定向爆破拆除[J].爆破,2008,25(3):68-70.
[4]FAN Lei,QI Shi-fu.Directional blasting demolition of water tower in complicated environment[J].Blasting,2008,25(3):68-70.(in Chinese)
[5]占学军,任贤斌,张晓平.石门坎大坝栈桥桥墩爆破倾倒历时及振动效应分析[J].长江科学院院报,2012,29(7):41-44.
[5]ZHAN Xue-jun,REN Xian-bin,ZHANG Xiao-ping.Toppling duration and vibration effect caused by blasting of hydraulic trestle pier[J].Journal of Yangtze River Scientific Research Institute,2012,29(7):41-44.(in Chinese)
[6]DL/T5333—2005水电水利工程爆破安全监测规程[S].北京:中国电力出版社,2005.
[7]张正宇,张文煊,吴新霞.现代水利水电工程爆破[M].北京:中国水利水电出版社,2003.
[8]李洪涛,舒大强,卢文波,等.建筑物对爆破振动中不同频率能量成分的响应特征[J].振动与冲击,2010,29(2):154-158.
[8]LI Hong-tao,SHU Da-qiang,LU Wen-bo,et al.Response characteristics of a structure to different frequency components in blasting vibration energy[J].Journal of Vibration and Shock,2010,29(2):154-158.(in Chinese)
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