基于PDCA循环的牛角山隧道光面爆破质量控制与技术改进

光面爆破质量直接关系到隧道施工的质量、安全及成本等，牛角山隧道凿岩爆破开挖施工过程中，采用PD—CA循环质量管理方法，根据TM隧道断面测量系统采集的断面超欠挖数据，进行现场检查、讨论分析，找出影响光面爆破质量的主要因素，通过制定有针对性的改进措施并监督执行，较好地提高了光面爆破效果，一次循环进尺平均光面爆破合格率达到95％，炮眼残留率达到85％，不仅保证了隧道施工质量，而且降低了施工成本，加快了施工进度，获得了良好的质量效果和经济效益。

Quality Control and Technical Improvement of Smooth Blasting Based on PDCA Cycling in the Niujiaoshan Tunnel

The quality of smooth blasting is directly related to the quality, safety and cost of tunnel construction. In the blasting excavation construction of Niujiaoshan tunnel, PDCA cycling quality administration method is adopted. According to the overbreak data collected from TM tunnel cross-section measurement system, in-situ inspection, discussion and analy- sis were carried out with the main influencing factors of smooth blasting being found out. Through formulating special impro- ving measures and supervising implementation, the effect of smooth blasting is well improved. The average qualified rate and residual rate of blast hole reach to 95% and 85% respectively. The construction quality of tunnel is improved, the con- struction cost is decreased and construction progress is accelerated. In conclusion, favorable quality and economic effects are achieved.