西南石油大学学报(自然科学版)

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Time and Space Change of Permeability for Rock Mass in Dam
Abutment High Slopes of Hydropower Engineering

Li Hong1*, Tian Hongyuan1, Liu Jianjun2   

  1. 1. School of Civil Engineering,Dalian University of Technology,Dalian,Liaoning 116000,China
    2. School of Geosciences and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2015-06-01 Published:2015-06-01

Abstract:

With regard to the seepage characteristics of the fractured rock mass in the dam abutment high-steep slopes for
large scale hydraulic and hydropower engineering in Southwest China,the experimental,theoretical models and numerical
simulation study results about its time and space features in the distribution changes due to natural and construction process
such as geological history,blasting excavation,support,impounding and flood discharge,rainfall,etc. are introduced. The
current research state and progress is assessed. The probing efforts and contributions from researchers in this field,who desire
to put this problem forward from qualitative to quantitative stage,are shown in the paper. It is proposed that in aspects of
the mechanism like stress-strain whole process,intensive unloading,multiple field coupling,anchorage and shotcrete,scale
effect,three dimensional pattern and monitoring in depth,further study is urgently needed in order to make the regularity clear
about the evolution of permeability of fracture rock mass in slopes along the damage and failure surrounding cracks,joints and
faults.

Key words: seepage characteristics, fractured rock mass, strong unloading, size effect, temporal and spatial change