摘要
丹巴闸坝工程拟修建在深覆盖层上,深覆盖层基础的变形和渗流稳定对工程影响很大.设计过程中采用三维有限元建立模型,对覆盖层基础的应力变形和渗流场进行计算.通过计算得出:(1)设计方案基础沉降变形在20 cm以内,顺河向位移在13 cm以内,变形整体不大;(2)蓄水后孔隙水压力增大使有效应力减小,基础沉降变形及大、小主应力均有明显减小;(3)深入基岩的防渗墙能起到很好的防渗作用,保证覆盖层的渗流稳定.
The deformation and seepage stability of deep overburden foundation have great influence on a gate dam. Three dimensional finite element model is used in the design process to calculate the stress and deformation of the overburden foundation and the seepage field. The calculation result shows ： （1） foundation settlement is less than 20 cm as design plan, and displacement along river within 13 cm, therefore, the deformation is small ; （2） after the impoundment, the in-creasing of pore water pressure decreased the effective stress, foundation settlement as well as major and minor principal stress were significantly reduced; （3） cutoff wall has good anti-seepage effect which ensures the seepage stability of overburden.
出处
《浙江水利水电学院学报》
2016年第6期29-33,共5页
Journal of Zhejiang University of Water Resources and Electric Power
关键词
覆盖层
应力变形
渗流
有限元
overburden
stress and deformation
seepage
FEM
