Rock Grouting at Dam Sites [Hardcover]

This book focuses on the permeability of the foundation of dams, how to determine their state and how to tighten permeable rock to achieve safe foundations for large dams. It includes theoretical fundamentals as well as lessons learned in their application in practical construction work in eminent projects. It also discusses aspects such as the permeability of the rock mass at the dam site, including the hydraulic characteristics of water conducting openings and their effect on the reliability of water pressure test (WPT) results; the influence of particular geological factors on the hydrogeological regime at the site, as well as the hydrofracturing behavior and individual groutability; and the relationship between quantities of grout takes and the degree of impermeabilization.

Introduction.- Water Flow in Rock: Geometry of Water Conducting Paths and Lugeon-values.- Examples of Grouting Programs.- Permeability Testing by Means of Water Pressure Tests.- Hydrofracturing of Latent Discontinuities in Rock and Implications for Successful and Economical Execution of Grouting.- Groutability and Grouting of Rock.- Hydrogeological Regime Around Dams and Reservoirs.- Doubts in GIN Principle Confirmed.

Friedrich-Karl Ewert?was born 1934 in Usedom (East Germany). From 1954 till 1956 he studied?Geography at Humboldt-University, East Berlin, and then Geology at the University in M?nster (Westphalia).For his fieldwork in the Pyrenees he obtained in 1964 a Doctorate in Geology. Until 1972 he worked as engineering geologist for hydro projects. In 1972 he became Professor of Geotechnics at the University of Paderborn from where he retired in 1997. From 1976 to 2002 he served as lecturer on dam foundation at the University of Technology, Delft, Netherlands.?

While supervising permeability testing and grouting for dam sites he learned that the common rules disregarded essential rock properties. This initiated a lifelong ylã#