不同试验方法对混凝土面板堆石坝筑坝粗粒料力学特性的影响分析  

Analysis of the Influence of Different Test Methods on the Mechanical Characteristics of Granular Materials of Face Rockfill Dam

作　　者：张鸥[1] 武利强[2] 李晓娜[3] 徐全恒 贾雪鹤 ZHANG Ou;WU Liqiang;LI Xiaona;XU Quanheng;JIA Xuehe(Yangling Vocational and Technical College, Yangling 712100, Shaanxi, China;Zhejiang Water Conservancy DisasterPrevention and Reduction Quality Inspection Station, Zhejiang Provincial Institute of Water Resources and Estuary, Hangzhou 310020, Zhejiang, China;School of Water Resources and Hydropower, Xi an University of Technology, Xi an 710048,Shaanxi, China;Inner Mongolia An-bang Safety Science & Technology Co . , Ltd . , Hohhot 010090, Inner Mongolia, China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]浙江省水利河口研究院浙江省水利防灾减灾质检站,浙江杭州310020 [3]西安理工大学水利水电学院,陕西西安710048 [4]内蒙古安邦安全科技有限公司,内蒙古呼和浩特010090

出　　处：《水力发电》2019年第8期126-131,共6页Water Power

基　　金：国家自然科学基金资助项目(51809212);国家自然科学基金项目(51609215);陕西省杨凌职业技术学院科学研究基金项目(A2018007)

摘　　要：结合某混凝土面板堆石坝工程,对筑坝材料各区进行现场大型压缩试验,通过反演计算得到堆石料的邓肯-张E-B模型参数,同时还进行室内三轴压缩试验得到堆石料力学参数。基于上述两种试验方法得到的粗粒料力学参数,采用三维非线性有限元法分别对大坝进行数值模拟计算,结果可知,现场大型压缩试验的试样料颗粒组成与分形特性更接近筑坝粗粒料原级配及分形特性,其加载应力路径也更接近大坝实际填筑及蓄水过程中的应力路径情况。Combined with a concrete face rockfill dam project, the large-scale on-site compressive modulus tests are carried out on various areas of dam materials, and the parameters of Duncan-Zhang E-B model are obtained through inversion calculation. At the same time, the mechanical parameters of rockfill materials are also obtained by indoor triaxial compression test. Based on these two sets of parameters of granular materials, the numerical simulation of dam is carried out by using the three-dimensional nonlinear finite element method. The results show that the particle gradation and fractal characteristics of sample material in on-site compressive test are closer to the original gradation and fractal characteristics of dam granular materials, and the loading stress path is also closer to the actual stress path during dam filling and water storage process.

关 键 词：现场压缩试验 室内三轴压缩试验 数值模拟 缩尺效应 应力路径 

分 类 号：TV641.43[水利工程—水利水电工程]