锦屏一级坝基岩体质量爆破开挖损伤评价  

ASSESSMENT OF ROCK MASS QUALITY WITH BLAST-INDUCED DAMAGE AT THE DAM SITE OF JINPING I HYDROPOWER STATION

作　　者：杨静熙[1] 舒建平[1] 刘忠绪[1] 何刚[2] 郭松峰[3] 祁生文[3] 

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,成都610072 [2]四川中水成勘院工程勘察有限责任公司,成都610072 [3]中国科学院地质与地球物理研究所,中国科学院页岩气与地质工程重点实验室,北京100029

出　　处：《工程地质学报》2016年第6期1318-1326,共9页Journal of Engineering Geology

摘　　要：锦屏一级水电站大坝为双曲拱坝,设计坝高305m,拱坝建基岩体以Ⅱ、Ⅲ1级岩体为主,开挖过程中岩体质量受爆破开挖影响发生程度不等的损伤。为定量评价岩体质量损伤等级,利用开挖爆破检测成果,采用开挖后岩体松弛深度、松弛岩体开挖前后单孔声波衰减率作为岩体质量损伤分级评价的指标,探索一种快速检测、评价岩体质量损伤等级的划分标准,完成坝基开挖后岩体质量损伤的分级分区评价,提出不同损伤等级处理的建议,并评价处理效果。Jinping Ⅰ hydropower station is a double-curvature arch dam,the designed height of which is 305 m.The foundation rock masses are mainly assigned to class Ⅱ,Ⅲ1. The rock masses are damaged in different degrees during the blasting excavation. For assessing the degree of rock mass damage quantitatively,the detection results of blasting excavation are used,in which rock mass relaxation depth and single-hole sonic attenuation of the relaxation rock after excavation are applied as an indicator to classify the degree of rock mass damage. A rapid detection method and classification standard of rock mass damage are proposed. Evaluation of rock mass damage after dam excavation is completed and treatment suggestion is proposed for the rock mass under different degree damage.

关 键 词：锦屏一级水电站 建基岩体 爆破开挖 质量损伤 检测 评价 

分 类 号：TU452[建筑科学—岩土工程]