地铁站内深基坑爆破开挖技术

广州地铁三号线广州东站南站厅深基坑在客流量大、建筑物密集的条件下进行爆破开挖施工，开挖沿既有建筑物基础边缘垂直进行。施工实践表明灵活选择爆破方法、优化爆破参数、慎重选择炮位和最小抵抗线方向、充分利用场地地质条件等方法是保证施工安全的有效措施。本文总结分析了施工中采用的爆破方案、爆破参数以及试验爆破过程，可供今后同类工程参考。

On the Blasting-Excavation Technique for Deep Foundation Pits Within the Subway Station

The deep foundation pits for the South Station Hall of the Guangzhou East Subway Station of the 3rd Subway Line of the Guangzhou Subway are blast-excavated where there are much traffic and many buildings. The excavation is vertically performed along the edge of the foundations of the existing buildings. Our construction practice has proved that the choice of flexible blasting methods, optimizing blasting parameters, careful choice of the blasting points and making full use of the site geological conditions are the effective measures to ensure construction safety. The paper sums up the blasting plans, blasting parameters and trial blasting in the project. It may serve as a reference for similar projects in future.