渗流连续原理确定RCC坝层面厚度的适应性

Study on adaptability of continuous seepage principle used for determining layer thickness of RCCD

利用变形等效原理建立了碾压混凝土坝等效弹性模量正分析模型,分析了按渗流连续原理确定的层面厚度对等效弹性模量的影响,结果显示等效弹性模量El和Ev几乎均等于本体弹性模量Ec,即层面对坝体的弹性模量几乎没有影响,与实际情况不符.理论分析和实例计算表明,按渗流连续原理确定的层面厚度应用在变形分析中是偏小的,在变形分析中采用该厚度是不适宜的.

Based on the equivalent deformation principle, an equivalent elastic modulus model for RCCDs was developed to analyze the influence of layer thickness determined by the continuous seepage principle on the equivalent elastic modulus. The result shows that the equivalent elastic modull El and Ev almost equal to the elastic modulus Ec of the dam body. In other words, the layer thickness has little influence on the elastic modulus of the dam body. The above conclusion does not accord with the reality. Furthermore, the adaptability of the layer thickness in deformation analysis was discussed, and the theoretical analysis and case study show that the layer thickness determined by the continuous seepage principle is too small to be adopted for deformation analysis of the dam body.