TB水电站地下洞室顶拱上仰无黏结预应力锚索施工技术  

Construction Technology of Upward Non-bonded Prestressed Anchor Cables for the Arch of Underground Cavern of TB Hydropower Station

作　　者：张利生 周山 ZHANG Lisheng;ZHOU Shan(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2024年第S02期63-67,共5页Yunnan Water Power

摘　　要：水电工程地下厂房及主变洞开挖尺寸大,围岩稳定要求高。通过对TB水电站地下厂房、主变洞顶拱上仰无黏结预应力锚索施工的探索及总结,摸索出了一套大断面地下洞室顶拱上仰无黏结预应力锚索的施工方法,解决了大断面地下洞室顶拱不良地质段的围岩安全稳定加强支护问题,抑制了顶拱围岩变型,厂房最大变形仅5.2mm,满足设计要求,取得较好效果。The excavation size of underground powerhouses and main transformer tunnels in hydropower projects is large,and the stability requirements of surrounding rock are high.Through the exploration and summary of the construction of non-bonded prestressed anchor cables on the top arch of the underground powerhouse and main transformer tunnel of TB hydropower station,this paper has developed a set of construction methods for non-bonded prestressed anchor cables on the top arch of large section underground caverns.It solves the problem of strengthening the support for the safety and stability of the surrounding rock in the unfavorable geological section of the large section underground cavern roof arch,and suppresses the deformation of the roof arch surrounding rock.The maximum deformation of the factory building is only 5.2mm,which meets the design requirements and achieves good results.

关 键 词：上仰无黏结 预应力锚索 TB水电站 地下洞室顶拱 

分 类 号：TV554.12[水利工程—水利水电工程]