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Analysis on Stress and Deformation of Jinping Ⅰ High Arch Dam after Foundation Reinforcement

HU Zhu-xiu1,ZHANG Jian-hai1,ZHOU Zhong2,RAO Hong-ling2(1.State Key Lab of Hydraulics and Mountainous River Engineering, College of Water Resources and Hydropower,Sichuan University,Chengdu,610065;2.Chengdu Hydroelectric Investigation and Design Institute,CHECC,610072)  
The complex geological conditions at the site of Jinping I Arch Dam makes its reinforcement measures a huge project,which mainly includes concrete seating replacement,shearing resistant adit,with the fault f13,f14 on the right bank,fault f5,f8 and lamprophyre veins on the left bank treated with concrete lattice replacement.By employing nonlinear finite element analysis,this article gives computing results and detailed discussion on dam stress and deformation characteristics of Jinping I Arch Dam under several operation conditions after the dam foundation is reinforced.The dam stress distribution and deformation are also discussed by way of strength reserve method and water gravity overload method.The results show that during the storage period,the overall characteristics of deformation and stress distribution of the dam have been significantly improved,tensile stresses in the heel of dam are decreased after reinforcement,and the dam has enough global stability storage to completely meet the design requirements.
【CateGory Index】: TV31;TV642.4
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