越流に伴う堤体の破壊現象に関する研究

Abstract

Centrifuge model tests were carried out in this paper to investigate behavior of pore-water pressure and hydraulic fracturing in earth dams caused by a rapid increase of the reservoir water during flooding. Focus is placed on discussing how earth dams behave at failure during flooding; sliding of soil mass?, interior erosion (piping) of fill materials? or exterior erosion by the action of over-flow water?, and which of these causes is the most influential in the process of embankment failure. Transmission of pore-water pressure in the fill associated with its permeability and the rate of reservoir filling is another important subject to be discussed; how and to what extent it is related to cause such catastrophic damages.