人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
22期
37-39,53
,共4页
易毅%汤子坚%张春安
易毅%湯子堅%張春安
역의%탕자견%장춘안
坝基岩体%表层低波速带%爆破松弛%卸荷松弛%地质构造
壩基巖體%錶層低波速帶%爆破鬆弛%卸荷鬆弛%地質構造
패기암체%표층저파속대%폭파송이%사하송이%지질구조
dam foundation rock%superficial low wave-velocity zone%explosive relaxation%unloading relaxation%geological structure
采用声波测试方法对大岗山水电站坝基岩体开挖完成后的岩体质量进行评价。因坝基岩体受开挖爆破、卸荷松弛及地质构造缺陷等因素的影响，岩体表层会出现不同深度的低波速带。通过对其表层低波速深度与爆破松弛深度以及表层低波速带深度等值线与地质构造的对比，分析了坝基岩体表层低波速带产生的原因及表层低波速带局部深度异常原因。
採用聲波測試方法對大崗山水電站壩基巖體開挖完成後的巖體質量進行評價。因壩基巖體受開挖爆破、卸荷鬆弛及地質構造缺陷等因素的影響，巖體錶層會齣現不同深度的低波速帶。通過對其錶層低波速深度與爆破鬆弛深度以及錶層低波速帶深度等值線與地質構造的對比，分析瞭壩基巖體錶層低波速帶產生的原因及錶層低波速帶跼部深度異常原因。
채용성파측시방법대대강산수전참패기암체개알완성후적암체질량진행평개。인패기암체수개알폭파、사하송이급지질구조결함등인소적영향，암체표층회출현불동심도적저파속대。통과대기표층저파속심도여폭파송이심도이급표층저파속대심도등치선여지질구조적대비，분석료패기암체표층저파속대산생적원인급표층저파속대국부심도이상원인。
Acoustic wave test was adopted for excavation quality evaluation of dam foundation rock mass at Dagangshan Hydro-power Station. Different level low wave-velocity zones were found at the superficial rock layer due to explosive influence, unloa-ding relaxation as well as geological faults. Through comparing low wave-velocity depth, explosive relaxation depth and contour of low wave-velocity with geological structure, the genesis of low wave-velocity rock zone and its local depth anomaly are dis-cussed.
