THE EFFECT OF DRAW-OFF ON FILTRATION REGIME OF EARTH-FILL DAM

Abstract

The article discusses the solution to the problem of transient seepage in relation to cases of rapid drawdown or draw-off, which may be caused by technological necessity or an emergency. This paper provides an overview of research and calculation methods for the problem under consideration. Using the PLAXIS software package, a numerical solution of the filtration problem for a homogeneous soil dam with a drainage prism is obtained. This problem has been repeatedly solved using other methods and computational programs. Comparison of the obtained results with those performed earlier by other methods showed their reliability and good comparability. The obtained results of solving the filtration problem at the next stage of the study of the structure operability can be used to assess the filtration strength of the soils of the dam and the stability of the upstream slope.

Keywords

• drawdown, draw-off, filtration flow, depression surface, filtration gradient, slope stability