碾压混凝土双曲拱坝、重力坝边坡开挖爆破技术的研究——以贵州大花水水电站碾压砼双曲拱坝为例

On the Explosive Excavation Technology of the Rolled-Concrete-Double-Curvature Arch Dam and Gravity Dam slope Taking the Rolled Concrete Double-Curvature Arch Dam in Dahuashui Hydroelectric Station in Guizhou for Example

贵州大花水水电站碾压混凝土双曲拱坝、重力坝开挖采用深孔梯段微差爆破.结合此地质条件,分析了岩层具体情况,对爆破参数和装药结构进行设计,准确控制钻孔的角度和梯段高度,使边坡开挖在满足技术质量的要求下,节约了成本,边坡预裂达到理想效果.

The excavation of the rolled concrete double-curvature arch dam and gravity dam in Dahuashui hydroelectric station in Guizhou adopted deep-hole graded slight differences demolition. According to the geology there, this paper, analyzed the rock stratum, designed the demolition parameter and powder structure, controled the angle of hole drilling and the height of the grade accurately. As long as the excavation of the slope meets the demands of technical quality, it would economize the cost and achieve ideal effect of the slope presplitting.