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锦屏一级高拱坝复杂的坝址地质条件使基础加固处理工程巨大,主要包括左岸混凝土垫座置换、左岸传力硐、左岸f5、f8、煌斑岩脉混凝土网格置换,右岸f13、f14断层混凝土网格置换。采用非线性有限元分析方法,对坝基加固后锦屏一级水电站坝体在多种工况下的的应力、变形特性进行了计算分析,给出了坝体蓄水期的应力、位移分布及超载、降强对位移的影响结果,并与无垫座方案的相关数据进行对比,表明加固后坝体蓄水期总体变形规律明显改善,坝踵拉应力减小,坝体与坝基安全储备能力提高,满足设计要求;在应力、变形方面肯定了大规模加固措施的必要性。
The geological conditions of the Jinping-class high arch dam complex dam site make the foundation reinforcement project huge, including the replacement of the left bank concrete pedestal, the left bank force entrance, the left bank f5, f8, lamprophyre concrete grid replacement, the right bank f13, f14 fault concrete grid replacement. The nonlinear finite element analysis method is used to calculate and analyze the stress and deformation characteristics of the dam of Jinping I Hydropower Station under various working conditions after the dam foundation is strengthened. The stress and displacement distributions of the dam during the hydropower station are also given. Overloading and reducing the impact on displacement and compared with the data of the non-plinth scheme, which shows that the overall deformation law of the dam after water-filling is obviously improved, the tensile stress of the dam decreases, the safety reserve capacity of the dam and dam foundation Improve, meet the design requirements; in the stress, deformation affirmed the necessity of large-scale reinforcement measures.