特高拱坝非平衡演化的变形稳定控制理论及应用  

Theory and Application of Deformation Stability Control of Non-equilibrium Evolution for Super High Arch Dams

作　　者：程立 刘耀儒[2] 吕庆超 杨强[2] CHENG Li;LIU Yaoru;L Qingchao;YANG Qiang(China Renewable Energy Engineering Institute,Beijing 100120,China;State Key Laboratory of Hydroscience and Hydraulic Engineering,Tsinghua University,Beijing 100084,China;PowerChina Xibei Engineering Corporation Limited,Xi an 710065,Shaanxi,China)

机构地区：[1]水电水利规划设计总院,北京100120 [2]清华大学水沙科学与水利水电工程国家重点试验室,北京100084 [3]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《水力发电》2019年第10期53-58,115,共7页Water Power

基　　金：国家自然科学基金资助项目(50709014,51739006);水沙科学与水利水电工程国家重点试验室科研项目(2016-KY-2)

摘　　要：与一般拱坝相比,特高拱坝坝体及坝基应力高且复杂,卸荷松弛、边坡时效变形等非平衡演化问题贯穿特高拱坝建设的全过程。高地应力区平衡态的岩体结构受到开挖、浇筑和蓄水等扰动后,平衡态被打破,产生损伤和大变形等非平衡演化问题,进而影响工程的建设、运行。建立了岩体结构非平衡演化的变形稳定控制理论框架,通过时效塑性余能范数反应岩体结构偏离平衡状态的程度,可用于岩体工程的稳定性评价;时效不平衡力的分布和大小,可用于局部破坏分析与评价。该理论已经在特高拱坝等岩体工程结构的较多关键问题中得到成功应用.Compared with general arch dams,the stress level of super high arch dams is much higher and more complicated.The unloading relaxation and other non-equilibrium evolution problems are throughout the whole construction process of super high arch dams,which are also the research hot topics in hydraulic rock mechanics at present.The original equilibrium of rock mass structure would be broken by excavation,construction,impoundment and other artificial disturbances resulting in non-equilibrium evolution phenomena such as material damage and large deformation with directly impacting on the construction and operation of project.The theoretical framework of deformation stability control of non-equilibrium evolution for rock mass structures is established.The time-dependent plasticity complementary energy norm reflecting the degree of rock mass structure deviating from the equilibrium state can be used for evaluating the stability.The distribution and magnitude of the time-dependent unbalanced force can be used for local failure analysis and evaluation.The theory has been successfully applied in many key problems of super high arch dams.

关 键 词：特高拱坝 岩体结构 非平衡演化 变形稳定控制 

分 类 号：TV222[水利工程—水工结构工程]