摘要
洪家渡水电站洞式溢洪道的断面尺寸为14.00 m×21.54 m,其进口边坡为顺向坡;洞身自上游至下游穿越的地层有永宁镇灰岩、九级滩页岩、玉龙山灰岩,其中灰岩段岩溶发育,页岩段岩性软弱、易风化;出口边坡高达148 m。为确保进出口边坡和洞身不良地质条件洞段围岩的稳定性,工程采用了预应力锚索和自钻式预应力锚杆等预应力锚固技术,并进行了观测。本文对洪家渡水电站预应力加固设计、施工及观测作了简要介绍。
The section size of the tunnel-spillway of is 14. 00 m×21.54 m. The slope of its inlet is consequent one, the height of its outlet slope reaches up to 148 m. Its tunnel body penetrates several strata, Yongningzhen limestone one, Jiujitan shale one and Yulongshan limestone one. Karst has developed in limestone parts and rock properties are soft and easily weather in shale part. In order to ensure the stability of slopes of its inlet and outlet as well as surrounding rock in some parts with bad geological conditions, the engineers adopted technologies of pre- stress anchor cable and self-drilling pre-stress anchor rod, and measure of observation. The article briefly introduces design, construction and observation of pre-stress reinforcement of Hongjiadu Hydropower Station.
出处
《贵州水力发电》
2005年第4期58-61,共4页
Guizhou Water Power
关键词
水利工程施工
洞式溢洪道
预应力锚索
自钻式预应力锚杆
洪家渡水电站
conservancy engineering construction, tunnel-spillway, pre-stress anchor cable, self-drilling prestress anchor rod, Hongjiadu Hydropower Station
