分层切割控制爆破拆除复合结构桥墩SLICE-BY-SLICE DEMOLITION OF A COMPOSITE STRUCTURE BRIDGE PIER BY CONTROLLED BLASTING
董正才,叶晓华,张少光
DONG Zheng cai, YE Xiao hua, ZHANG Shao guang (Command Institute of Engineering Corps, PLA, Xuzhou, Jiangsu 221004, China)
摘要(Abstract)：
介绍了复杂环境中复合结构桥墩的分层松动爆破拆除。整个桥墩从上到下被分成五部分 ,即上、中、下墩身 ,基础承台和基底承台 ,并针对每一部分的具体情况 ,设计布孔方案和爆破参数 ,确定单孔装药量。对于环境条件受限、不能整体爆破定向倒塌或原地爆破坍塌的桥墩 ,本工程采用的爆破拆除方法可作参考。
In this paper, slice by slice demolition of a composite structure bridge pier in complicated surroundings by loose controlled blasting was presented. The bridge pier was divided into five parts from top to bottom, or upper, middle and lower sections of the pier shaft, base and bottom of the pier. In light of the concrete conditions of every part, the blast hole pattern and blasting parameters were designed and single hole charge weights determined. For the bridge piers that are impossible to be collapsed directionally or vertically by controlled blasting because of limited environmental conditions, the blasting demolition method adopted in this project can be used as a reference.
关键词(KeyWords)：
复合结构;桥墩;分层切割;拆除爆破
Composite structure; Bridge pier; Slice by slice cutting; Demolition blasting
基金项目(Foundation):
作者(Author):
董正才,叶晓华,张少光
DONG Zheng cai, YE Xiao hua, ZHANG Shao guang (Command Institute of Engineering Corps, PLA, Xuzhou, Jiangsu 221004, China)