摘要
根据丰满混凝土重力坝现场渗流观测资料数据，采用非线性最小二乘法识别坝体混凝土和坝基岩石的渗透系数。基于大坝渗透系数的识别结果，采用三维有限元法分析了大坝坝体和坝基的渗流场。渗流场自由面位置的确定采用压缩网格法，经迭代求得。大坝渗透系数识别采用迭代方法进行，其中搜索方向由Ｌｅｖｅｎｂｅｒｇ－Ｍａｒｑｕａｒｄｔ法确定。工程实际应用表明，所提出的三维非承压水渗流场分析和大坝渗透系数识别方法是非常有效的。
Based upon in-situ measured data of seepage of Fengman concrete gravity dam and making use of the least square method, the permeable coefficients of the concrete dam and rock basement are identified. The seepage fields are studied with finite element method based on the identification results of aquifer parameters. The free surface positions are determined with compressing mesh method and iteration procedure. Aquifer parameter identification is made by means of iteration procedure. The search directions are determined with Levenberg-Marquardt procedure. The practical application shows that the presented study of three dimensional seepage field with free surface and the identification procedure of aquifer parameters are available.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2001年第4期477-480,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(10072014)
工业装备结构分析国家重点实验室开放基金(GZ9908)资助项目.
关键词
混凝土重力坝
渗流
自由面
渗透系数
concrete gravity dam, seepage, parameter identification, free surface, permeable coefficient
