刘义恒,李伟,鲁志永,王勇伟
LIU Yi heng;LI Wei;LU Zhi yong;WAN G Yong wei (Yellow River Engineering Technica l Development Co ;

• 1:黄河工程技术开发公司
• 2:黄河工程技术开发公司
• 3:黄河工程技术开发公司
• 4:黄河工程技术开发公司 郑州　450003

摘要(Abstract)：

采用控制爆破技术拆除包括126m长公路桥、启闭机桥、启闭机房在内的闸墩上部钢筋混凝土构筑物,而所有闸墩得以保护。由于待拆构筑物的结构有很大差异,爆破设计中只给出了爆破参数的设计原则,实际的布孔参数、单孔装药量按各构筑物的具体结构和条件来确定。对于较大深度的炮孔,实施分段装药。为了保护闸底板,爆破前在底板上铺设2m厚的砂袋,并对公路桥实施分次爆破。
The reinforced concrete c onstructions on the top of gate pi ers including a highway bridge wit h a length of 126 meters,the bridg e and buildings of headstock gear were demolished by controlled blastin g while all gate piers were protec ted Because the constructions to b e demolished have a great structur al difference,the principle of bla sting parameter design is given on ly in blasting design while actual parameters for hole pattern and on e hole charge weight are determine d according to concrete structure and conditions of every constructi on Decked charge structure was use d for the blastholes with a greate r depth To protect gate floor,a sa ndbag layer with a thickness of 2 meters were laid on the floor befo re blasting and the highway bridge was blasted piece by piece

关键词(KeyWords)： 拆除爆破;公路桥;启闭机桥;启闭机房;爆破参数;控制爆破
Demolition blasting; High way bridge; Headstock gear bridge; H eadstock gear building; Blasting pa rameters; Controlled blasting

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作者(Authors): 刘义恒,李伟,鲁志永,王勇伟
LIU Yi heng;LI Wei;LU Zhi yong;WAN G Yong wei (Yellow River Engineering Technica l Development Co ;

参考文献(References)：

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• 〔2〕陈华腾,钮强,谭胜禹 爆破计算手册[M] 沈阳:辽宁科学技术出版社,1991
• 〔3〕冯叔瑜,吕毅,杨昌杰,顾毅成 城市控制爆破[M] 北京:中国铁道出版社,1985