大角度折线型高面板堆石坝三维数值模拟分析及应用  

Three-dimensional Numerical Simulation Analysis and Application of High Concrete Face Rockfill Dam with Large Angle Broken Line

作　　者：朱安龙 廖洁[2] 沈超敏[2] 姜忠见 刘斯宏[2] ZHU Anlong;LIAO Jie;SHEN Chaomin;JIANG Zhongjian;LIU Sihong(PowerChina Huadong Engineering Corporation Limited,Hangzhou 310014,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]河海大学水利水电学院,江苏南京210098

出　　处：《华北水利水电大学学报（自然科学版）》2018年第5期45-52,共8页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家重点研发计划项目(2017YFC0404800)

摘　　要：对大角度折线型高混凝土面板堆石坝进行系统的研究,探索其受力变形规律,有利于进一步提高混凝土面板堆石坝的筑坝技术,同时拓宽混凝土面板堆石坝的应用范围。以某拟建工程为例,采用三维非线性有限单元法,建立折线型面板堆石坝的数值模型,分析其坝体及面板的应力、应变变化规律,研究折线型坝体结构与面板结构缝变形之间的非线性关系。研究结果表明:采用三维非线性有限单元法进行折线型混凝土面板堆石坝整体性能研究是可行的;折角两侧的坝体沿坝轴线方向具有向折点部位偏移的趋势;在坝体变形的带动下,两侧面板的水平向拉应力和结构缝张开变形增大;重点提高堆石体力学性能,以及利用转角布置的灵活性优化整个大坝的布置条件,可有效地提高折线型面板堆石坝运行的安全性。Systematically studying the high concrete face rockfill dam with large angle broken line and exploring the law of stress and deformation will help to further improve the dam construction technology of concrete face rockfill dam and broaden the application scope. Taking a proposed project as an example, the three-dimensional nonlinear finite element method was used to establish the nu- merical model of the broken line face rockfill dane The stress and strain variation laws of the dam body and the panel were analyzed respectively, and the nonlinear relationship between the dam structure with broken line type and the structural joint defomlation was studied. The research results show that it is feasible to study the overall performance of the broken line concrete face rockfill dam by using the three-dimensional nonlinear finite element method, and the dam on both sides of the comer has the trend of shifting towards the cor- ner along the axis of the dam, and the horizontal tensile stress and the joint opening deformation of the side panels increase with the deformation of the dam. hnproving the mechanical properties of rockfill and optimizing the layout conditions of the whole dam with the flexibility of rotation arrangement can effectively improve the operation safety of the broken line face rockfill dam.

关 键 词：折线型面板堆石坝 非线性有限单元法 三维数值模拟 连接板 结构缝 张拉变形 

分 类 号：TV641[水利工程—水利水电工程]