Permeability in flysch — Distribution decrease with depth and grout curtains under dams

摘要: A considerable number of in situ permeability tests flysch are processed to a depth 120m with good spatial distribution. The distribution values for the different litho-types this formation, their comparison and decrease is discussed. where 3 5×10−7m/sec can be retained (the limit reasonable grouting under high dam) may twofold if geological history formation could not contain compressional tectonic process. This reach 100m some cases. differences mean among various minor, while presence siltstones, always present although varied participation, dramatically controls global permeability.