高堆石坝水力耦合模型及工程应用

建立了高面板堆石坝非线性变形与非稳定渗流的水力耦合模型。该模型分别采用邓肯 <> E -<>B 模型和抛物 Signroini 型变分不等方法模拟堆石体的非线性应力变形过程和非稳定渗流过程，并通过修正的 Kozeny-Carman 模型表征堆石体的渗透特性对变形和围压的依赖关系。在面板渗透系数反演分析的基础上，应用上述模型对水布垭面板堆石坝进行了渗流–变形耦合分析。通过对数值模拟结果与实测数据的对比分析，表明因面板的绝对防渗作用，堆石体中的水力耦合效应并不显著，且上述模型可在一定程度上揭示堆石坝的渗流及变形发展趋势；但因忽略了流变、湿化、室内试验参数的尺寸效应以及非饱和渗流等，上述模型也存在较为突出的局限性。研究成果对于高面板堆石坝的水力耦合分析具有一定指导意义。

Coupled hydromechanical model for high concrete-faced rockfill dams and its application

A coupled hydromechanical(HM) model is established for performance assessment of concrete-faced rockfill dams(CFRD).The non-linear elastic deformation of the rockfills is described by means of the Duncan-Chang's E-B model,and the non-steady seepage flow behavior is modelled by use of the newly-developed parabolic variational inequality formulation of Signorini's type.The Kozeny-Carman equation is calibrated to characterize the dependence of permeability of the rockfills on deformation by taking into account...