锦屏一级水电站地下厂房系统对穿预应力锚索孔孔斜控制施工技术

Construction Technology of Hole Deviation Control for Horizontal Pre-stressed Anchor in the Underground Powerhouse System of Jinping First Stage Hydropower Station

摘要:

锦屏一级水电站地下厂房洞室主机间、主变室、母线洞等洞室系统的边墙、蚀变岩段和较大断层采用了对穿预应力锚索加强支护。在对穿预应力锚杆的施工过程中，根据不同的地质地层段，采取严格的孔斜控制措施，并不断地改进控制方法，基本解决了对穿预应力锚索造孔孔斜控制的技术问题，满足了设计技术要求，积累了对穿预应力锚索孔斜控制施工经验。

Abstract:

Reinforced support was made for the side wall, altered rock and large fault of the main engine compartment, main transformer room and bus cavern in underground powerhouse of Jinping 1 hydropower station by the horizontal pre-stressed anchor. In the construction process of pre-stressed horizontal anchor, according to the different geological formations, hole deviation was basically solved by strict control methods with continuous improvement.