隧道超欠挖成因及其控制技术

The Cause of Excessive or Insufficient Excavation in Tunnel Construction and Its Control

在隧道钻爆法施工中,隧道超欠挖是不可避免的,其不仅对隧道施工的工程质量和安全进度产生重要的影响,而且会影响工程的经济效益。结合具体工程实践,分析了影响隧道超欠挖产生的五个主要因素,即围岩地质条件、钻孔精度、测量放线、爆破技术和现场管理等,并有针对性地提出了控制隧道超欠挖所应采取的技术措施。

In the tunnel construction by drill-blast method, excessive or insufficient excavation is ineluctable. It has not only important influence on the work quality and the safe progress in the tunnel construction, but also on the economic benefit in tunnel engineering. This article based on the engineering practice, analyzes five main factors affecting the excessive or insufficient excavation:drill precision, the act of measuring, blasting technology, the geology of wall rock and real - time management, and the relevant technology of its control is put forward.