胶凝砂砾石料蠕变试验及大坝长期变形预测  

Creep Test of CSG and Long-Term Deformation Prediction of CSG Dams

作　　者：郭兴文[1] 杜建莉 赵骞 蔡新[1,3] GUO Xingwen;DU Jianli;ZHAO Qian;CAI Xin(College of Mechanics and Materials,Hohai University,Nanjing 211100,China;State Grid Anhui Electric Power Co.,Ltd.Electric Power Research Institute,Hefei 230601,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100 [2]国网安徽省电力有限公司电力科学研究院,安徽合肥230601 [3]河海大学水利水电学院,江苏南京210098

出　　处：《人民黄河》2019年第9期149-154,共6页Yellow River

基　　金：国家重点研发计划项目(2018YFC0406804);水利部土石坝破坏机理与防控技术重点实验室开放基金资助项目(YK913001);“十二五”国家科技支撑计划项目(2012BAD10B02);国家自然科学基金资助项目(51179061)

摘　　要：为了建立合理的胶凝砂砾石料蠕变模型,进行了大坝长期变形预测,并研究了胶凝材料掺量对胶凝砂砾石料蠕变特性的影响。采用Burgers模型描述胶凝砂砾石料颗粒间的界面特性,通过细观力学均匀化方法得到胶凝砂砾石料蠕变本构模型。进行了4组不同胶凝材料掺量的胶凝砂砾石料单轴压缩蠕变试验,分析了不同胶凝材料掺量下胶凝砂砾石料的蠕变特点,进而依据试验数据拟合出所得模型相关参数。将蠕变本构模型植入ANSYS软件平台,进行了胶凝砂砾石料试件的蠕变模拟,结果表明提出的蠕变模型能较好地预测胶凝砂砾石料的蠕变变形。应用所提模型与参数对某胶凝砂砾石坝进行了长期变形计算分析。The paper aimed at establishing a reasonable creep model of cemented sand and gravel(CSG)for estimating the long?term de?formation of CSG dam and analyzing the influence of cement content on creep features.It adopted Burgers model to describe the interface characteristics between cemented gravel particles,and the creep constitutive model of CSG was obtained with micromechanical homogenization method.Single?axial compression creep tests were carried out for four groups of CSG with different dosage,and the creep characteristics of CSG with different gelation content were analyzed.Then the relevant parameters of the model were obtained according to the experimental data.The creep constitutive model was implanted into the ANSYS software platform for simulating the creep simulation of CSG.The results show that the proposed creep model can be used to estimate the creep deformation of CSG.Finally,the durability of a CSG dam was calculated according to the interface fitting material parameters.

关 键 词：胶凝砂砾石料 蠕变试验 长期变形 

分 类 号：TV41[水利工程—水工结构工程]