董箐水电站高边坡开挖与支护施工技术

贵州北盘江董箐水电站右坝肩、厂房后边坡及放空洞出口边坡均属高陡、薄层顺向坡，边坡开挖的稳定性问题十分突出。通过现场边施工、边勘察、边调整，查明了边坡的工程地质和水文地质条件，掌握了影响边坡稳定的主要因素及边坡可能的破坏模式，之后对各部位边坡采取了相应的施工技术措施，成功抑制和减少了边坡岩体的顺层滑塌，使边坡开挖的轮廓尺寸保持较完好，开挖后的坡面完整，取得了良好的工程效果。

Construction Technique of Excavating and Supporting Applied to High Side Slope in Dongqing Hydropower Station

The right dam abutment, side slope behind powerhouse and emptying tunnel outlet slope are parts of high steep slope with thin - bedded consequent slope in Dongqing Hydropower Station. The stability of slope excavation is quite outstanding. According to site construction, site exploration and site adjustment at the same time, the con- structor found out the engineering geological and hydrogeological conditions, has mastered the primary factors that influence the slope stability and failure pattern that slope probably occur. Therefore the constructor took correspond- ing construction technique measures that successfully controlled and reduced the bedding slump. The profile size of slope excavation was kept fairly good as well as the slope face after excavating was integrated. Thus the project affect is good.