挖孔桩爆破开挖及安全技术措施探讨

介绍了爆破开挖挖孔桩的工程实例。根据岩层特性和不同断面,选择合理的爆破孔网参数、装药结构、起爆顺序和爆破网路实施桩孔爆破,爆破后使桩孔获得设计开挖轮廓线。在桩孔内人员上下、有害气体危害、起吊机具等方面采用多项安全可靠的技术措施,确保挖孔桩爆破开挖的安全。较好地实现了"安全、质量、工期、效益"的项目管理目标,可供类似条件下挖孔桩爆破开挖及安全防护工程参考。

BLASTING EXCAVATION OF DIG-HOLE PILE AND DISCUSSION OF SAFETY TECHNICAL MEASURES

An engineering example of blasting excavation of dig-hole pile was introduced.Depending on the characteristics and different sections of rocks,the reasonable blasting parameters,charge structure,detonating sequence and blasting network were selected properly,and then the design excavation outline for the pile holes were reached.During the period of the blasting excavation activities,various reliable safety measures were taken in respect to personnel up and down within the pile holes,poisonous and harmful gas and lifting machinery etc.,which realized project management goals involving "safety,quality,duration,profit".This technology could provide some guidance for blasting excavation and safety protection under similar condition.