Permeability in flysch, distribution, decrease with depth and grout curtains under dams
A considerable number of in situ permeability tests in flysch are processed to a depth of 120m with a good spatial distribution. The distribution of permeability values for the different litho-types of this formation, their comparison and their decrease with depth is discussed. The depth where a permeability of 3 to 5.107m/sec can be retained (the limit of a reasonable grouting under a high dam) may be twofold if the geological history of the formation could not contain a compressional tectonic process. This depth may reach 100m in some cases. The differences in the mean values of permeability among the various litho-types are minor, while the presence of siltstones, always present although with varied participation, controls dramati- cally the global permeability.
V.P.Marinos P.J.Fortsakis G.K.Prountzopoulos P.G.Marinos
National Technical University of Athens,Athens,Greece
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
544-547
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）