龙滩水电站地下厂房进水口高边坡加固支护设计

Reinforcing Design for Intake High Slope at the Underground Powerhouse of Longtan Hydropower Station

龙滩水电站地下厂房进水口高边坡开挖坡高达 435m ,坡面面积达 2 7万m2 ,为典型的反倾向层状结构岩质高边坡。为了确保进水口坝段的稳定 ,必须保持边坡岩体有足够的稳定性 ,通过采取边坡轮廓设计 ,防渗、排水设计 ,加固支护设计及施工控制等一系列措施 ,确保边坡稳定。文章简要论述了边坡设计的原则、标准、高边坡轮廓设计、防渗排水系统、加固支护措施、施工控制等情况。

The excavation of intake for the underground powerhouse of Longtan hydropower station formed a slope as high as 435 m with the slope area of 270,000 m 2. The design must provide the reverse stratified rock high slope, which has complicated outline, with sufficient stability to ensure the safety operation of the dam section at intake. In this paper, a brief introduction is made to the design principle and standard of the high slope, the profile design of the high slope, drainage system against seepage, reinforcing and supporting measures and controlling measures during construction of the project.