蒙江上尖坡水电站重力坝深层抗滑稳定设计研究

The Gravity Dam of Mengjiang Shangjianpo Hydropower Station Deep Anti-slip stablity Design Research

上尖坡水电站右坝肩岩体内发育一道泥化夹层、一道大溶隙带、两组陡倾角裂隙。大溶隙带埋深较浅,作了挖除处理。而泥化夹层位于坝基以下9m深处,使大坝深层抗滑稳定不满足要求,采用大齿墙切穿泥化夹层的办法解决了深层滑动问题,节约了开挖量、坝体方量和施工工期,同时降低了边坡风险和边坡工程量,取得了很好的效果。详述了齿墙的设计思路和计算方法,用简图方式特别列明了各部位的受力分析和力的计算原则,以供同行参考。

There are a mudded interlayer, and a large dissolution gap,and 2 group high dip angle fissures in the right dam shoulder rock of Shangjianpo Hydropower Station. The bury depth of the large dissolution gap is shallow, so it is dug out. The mudded interlayer locates at a depth of 9 m below the dam base. This causes that the dam does not meet the requirement of deep anti-sliding stability. The deep sliding problem is solved by cutting through mud interlayer with a large tooth wall, which saves the did-volume, the dam-volume, and construction period, reduces slope risk and slope engineering capacity. In this paper, the design idea and calculation method of the tooth wall design are described in detail, and the principle of force analysis and force calculation of each part is specified by using the simple drawing method. This paper is a reference for the colleagues.