松花江旧铁路大桥桥墩的水下爆破拆除DEMOLITION OF THE PIERS OF OLD RAILWAY BRIDGE ACROSS SONGHUA RIVER BY UNDERWATER BLASTING
齐世福,李尚海,胡良孝
QI Shi-fu~1;LI Shang-hai~2;HU Liang-xiao~2 (1.Engineering Institute;
摘要(Abstract)：
旧松花江铁路大桥的上部结构拆除后 ,采用深孔和浅孔爆破相结合的方法将位于主航道内的桥墩拆除。利用钻孔探明了桥墩的结构和配筋情况。文中论述了爆破方案的确定和水下深孔爆破炸药单耗的选取 ;介绍了炮孔布置参数、装药结构和参数、起爆方法 ;同时对爆破安全性进行了预估。
After the superstucture of the old railway bridge across Songhua river was demolished,the piers located in the main channel were demolished by the blasting method combining long holes with short holes.The pier structure and the placing of steel bars were proved by use of borehole surveying.In this paper,determination of blasting scheme and selection of the powder factor for long-hole blasting in water were expounded.The parameters of blasthole pattern,the structure and parameters of charges and priming method were introduced.At the same time,the prediction of blasting safety was carried out.
关键词(KeyWords)：
铁路桥;桥墩拆除;水下爆破;深孔爆破
Railway bridge;Pier demolition:Underwater blasting;Long-hole blasting
基金项目(Foundation):
作者(Authors):
齐世福,李尚海,胡良孝
QI Shi-fu~1;LI Shang-hai~2;HU Liang-xiao~2 (1.Engineering Institute;