摘要
大岗山拱坝是我国目前抗震设防烈度最高的拱坝,其基岩水平峰值加速度为0.557 5 g,在设计地震荷载作用下,建基面最大压应力达12.43 MPa,要求建基面的质量必须与之相适应。建基面质量评价包括开挖质量和岩体质量两方面,开挖质量评价按照有关规范的单元工程质量等级评定标准进行,岩体质量评价以地质鉴定岩类为主,声波纵波速度为辅。按事先拟定的开挖方案,建基面开挖平顺,开挖质量达到优良标准。
With the highest anti-seismic parameters,the horizontal peak acceleration of Dagangshan arch dam is 0.5575g,the largest compression stress of dam base level under the effect of earthquake loads is 12.43MPa,requiring the base quality should be in accordance with the stress.The evaluation of base quality includes the excavation quality and rock mass quality,the evaluation of excavation quality is conducted according to the relevant engineering quality grading evaluation criteria,while the evaluation of rock mass is made by rocks geological identification,supplemented by acoustic longitudinal wave velocity.According to the excavation program determined previously,the smooth excavation of base is conducted,and the excavation quality has reached excellent standards.
出处
《人民长江》
北大核心
2012年第22期12-15,共4页
Yangtze River
关键词
建基面
开挖质量
岩体质量
拱坝
大岗山水电站
dam base level
excavation quality
rock mass quality
arch dam
Dagangshan Hydropower Station
