摘要
构皮滩水电站大坝为国内岩溶地区最高的双曲拱坝,最大坝高232.5 m。坝基岩石坚硬、强度高,但分布有溶洞、溶蚀夹泥带、破碎带等地质缺陷,对坝基承载力、变形特性等均有影响。通过前期勘察工作,查明了大坝坝基及拱座岩体中主要地质缺陷的分布与性状,开挖后揭示的地质条件与前期成果基本一致。根据地质缺陷的影响程度,采取了挖、填、灌等浅层或深层处理,处理效果良好。
Goupitan hydropower Station is the highest double curvature arch dam in domestic karst areas, with the height of 232.5 m. The dam foundation rock is hard with high strength, however, geological defects exist due to karst cave, corrosion belt with mud and fracture zone, which affect the bearing capacity and deformation property of foundation rock. We find out the distri- bution and characteristics of main geological defects in dam foundation and arch abutment rock through geological exploration at earlier stage, the results are basically consistent with that revealed after excavation. The measures of excavation, filling and grouting are taken according to the influence degrees of geological defects.
出处
《人民长江》
北大核心
2010年第22期16-20,共5页
Yangtze River
关键词
岩溶坝基
高拱坝
地质缺陷处理
构皮滩水电站
karst dam foundation
high arch dam
geological defect treatment
Goupitan Hydropower Station
