碾压混凝土坝渗流场与应力场耦合模型研究

针对碾压混凝土坝存在众多施工层面问题，提出了确定影响层厚度以及相应物理力学参数的方法；在此基础上，探讨并建立了碾压混凝土坝渗流场与应力场两场耦合模型，研制了相应的三维有限元程序．研究表明，结合试验和理论分析确定的碾压混凝土坝层面影响层的厚度、弹性模量和泊松比等参数更切合实际；提出的碾压混凝土坝渗流场与应力场两场耦合模型，能较好地体现两场耦合作用，开发的三维有限元模型能较充分反映碾压混凝土坝施工层面的特性．通过研究，为分析施工层面对碾压混凝土坝变化性态影响，以及了解大坝的应力和渗流的相互作用提供了科学依据．

Study on Coupling Model of Seepage-Field and Stress-Field for RCCD

Based on the construction interfaces in RCCD, the methods were proposed to calculate the influence thickness of construction interfaces and the corresponding physical mechanics parameters. The principle on establishing the coupling model of seepage-field and stress-field for RCCD was presented. A 3-D FEM program was developed. Study shows that such parameters as the thickness of construction interfaces, the elastic ratio and the Poisson's ratio obtained by tests and theoretical analysis are more reasonable, the coupling model of seepage-field and stress-field for RCCD may indicate the coupling effect between the two fields scientifically, and the developed 3-D FEM program can reflect the effect of the construction interfaces more adequately. According to the study, many scientific opinions are given both to analyze the influence of the construction interfaces to the dam's characteristicinteraction between the stress-field and the seepage-field.