500 kV高压线下预应力钢筋混凝土桥拆除爆破  

Demolition blasting for pre-stressed concrete bridge under 500 kV high pressure wire

作　　者：刘贵军 汪海波[2] 宗琦[2] LIU Gui-jun;WANG Hai-bo;ZONG Qi(MCC(Guizhou)Construction Investment Development Co.,Ltd.,Guiyang 550003,China;School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,Anhui,China)

机构地区：[1]中冶(贵州)建设投资发展有限公司,贵阳550003 [2]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《工程爆破》2020年第1期54-58,64,共6页Engineering Blasting

摘　　要：根据待拆桥梁结构特点和周围环境情况,采用控制爆破技术对500kV高压线下现浇预应力钢筋混凝土箱梁桥进行拆除爆破。在确定桥梁的爆破方案和区域划分的基础上,针对桥梁墩柱、箱梁及桥台各自结构特点,制定不同的爆破参数、装药结构、起爆网路和安全防护措施,控制了爆破的危害效应,达到了预期的爆破效果,为类似条件下的桥梁工程拆除爆破提供参考。According to the structural characteristics and the surrounding environment of the bridge to be demolished,the cast-in-situ reinforced concrete box girder bridge under 500 kV high-pressure line was demolished by controlled blasting technology.On the basis of determining the blasting scheme and regional division of bridge,different blasting parameters,charging structure,initiation network and safety protection measures are formulated according to the structural characteristics of piers,box girders and abutments of bridge.The harmful effects of blasting are controlled,and the expected blasting effect is achieved,which provides a reference for the demolition blasting of bridges under similar conditions.

关 键 词：预应力桥梁 控制爆破 拆除爆破 安全防护 

分 类 号：TD235[矿业工程—矿井建设]