摘要
鉴于锦屏一级水电站左岸坝肩边坡地质条件复杂，结构面发育，本文采用三维离散元3DEC方法，结合左岸边坡监测数据对整体计算模型和结构面计算参数进行设计，在此基础上分析其开挖变形特征及潜在变形失稳模式。分析表明，开挖变形受结构面控制明显，且上部倾倒变形特征显著，体现出2150～2230m高程区间倾倒型解体型的潜在破坏方式，其整体滑移稳定安全系数大致在1．2～1．3。
In view of complicated geologic conditions of Jinping I Hydroppwer Station dam left abutment slope with well developed discontnuities, three dimensional distinct element method--3DDEC is adopted in combination with the left slope monitoring data to establish the integral computation model and to determine the discontinuities computational parameters. Based on the work mentioned above,the slope deformation resulting from the excavation and the potential destabilization mode are analyed. It is believed that the deformation due to the excavation is obviously dominated by the discontinuities and the upper part deformation is characterized by tipping. It is revealed that between EL 2150m and EL 2230m potential failure of tipping form and disintegration form exist and the integral stability safety factor against sliding ranges between 1.2 - 1.3.
出处
《水电站设计》
2010年第1期8-14,共7页
Design of Hydroelectric Power Station
