3D Finite Element Analysis on a 270 m Eztra High Concrete Faced Rockfill Dam
There are many suitable sites in China for building extra high concrete faced rockfill dams (CFRD) in Jinsha River,Lancang River,Nu River,Yalong River,Daduhe River and Yellow River,such as the 250350 m height Cihaxia power station,Maji power station,Gushui power station,Rumei power station.Compared with concrete dam schemes,CFRD schemes of above 4 dams can save 44.4 billion,50 billion,68.4 billion,193 billion Yuan investmant respectively.Compared with core rockfill dam,the CFRD still have the advantages of saving project investment.However,it has no super high CFRD with dam height more than 233 m been ever built in the world and the history of construction and design of extra high CFRD is relatively short. The experience is still needed to be accumulated during the practice of extra high CFRD and more hard problem of extra high CFRD is still to be explored and solved. In this paper,stress and deformation characteristic of a 270 m extra high CFRD is analyzed by 3D finite element method and some beneficial reference is obtained. Firstly,the advanced 3D mesh generation procedure written by Fortran language is used to form the finite element mesh which contained not only the dam with large amount of vertical joins and peri-metric joints,but also the rock foundation and surrounding mountains.Moreover,the layer by layer construction procedure of dam is detailed considered during 3D mesh generation. And a great deal of mesh generation time is saved by the self compiled procedure. Secondly,since the node number of 3D mesh is still larger,large scales equations solving method-element by element method and other efficient measures are adopted. As the results,the computer calculation time decrease from former 48 hours to 20 minutes. Finally,Studies on deformation behavior of 300 m high-concrete face rockfill dams are conducted using three-dimensionalfinite element numerical analysis method.Comparison with calculation results or monitoring data of others 233 m Shuibuya,189 m Hongjiadu dams shows that the calculating stress and strain characteristic of this 270 m high CFRD is accurate. According to the calculation results,the design scheme of the 270 m dam will be optimized.
finite element method eztra-high CFRD stress and strain
Sun Dawei Li Nenghui Deng Haifeng Liu Junjian
Department of Civil and Hydroelectric Engineering,China Three Gorges University,Yichang,443002,China Department of Geotechnical Engineering,Nanjing Hydraulic Research Institute,Nanjing 210024,China
国际会议
The 1st International Symposium on Rockfill Dams(第一届堆石坝国际研讨会)
成都
英文
269-278
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）