闹市区特殊工况下毫秒微差法爆破施工技术

Milliseconds Differential Blasting Construction Technology under Special Conditions in Downtown

为解决闹市区爆破作业的难题,依托长沙国金中心项目展开研究。在通过优化爆破参数设计、次生危害控制、特殊工况下安全分析、毫秒微差法爆破施工,成功解决了闹市区特殊工况条件下安全爆破施工的难题,既实现混凝土的粉碎程度满足施工要求,又确保临近支护结构安全、周边建筑物不受爆破影响。

In order to solve this problem on blasting operation in downtown area,project of Changsha National Financial Center is studied.Through optimizing blasting parameter design,secondary hazard control,safety analysis under special working conditions and milliseconds differential blasting construction,the difficult problem of safe blasting construction under special working conditions in downtown area has been successfully solved,which not only realizes crushing degree of concrete to meet construction requirements,but also ensures safety of adjacent supporting structure and the surrounding buildings not affected by blasting.