Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Several geophysical methods used by the Bureau of Reclamation to obtain the in situ shear wave velocity of earth embankments were evaluated. In situ low-strain shear wave velocity determinations have been performed on a number of existing zoned earthfill dams and an earth dam under construction. These field measurements of shear wave velocity by geophysical exploration methods have become an integral part and standard procedure at the Bureau for obtaining input parameters for dynamic analyses of earth dams. In the course of shear wave velocity measurements, various borehole methods, such as downhole, crosshole, and uphole, as well as seismic refraction have been used. Shear wave velocity measurements have been performed with explosive and nonexplosive impulsive energy sources using cased and uncased test holes. The results of these field studies have not only provided input parameters for dynamic analyses, but have also provided information as to which method or combination of methods should be used to obtain optimum results. Test methods and results of the various in situ measurements are compared and evaluated.
Several geophysical methods used by the Bureau of Reclamation to obtain the in situ shear wave velocity of earth embankments were evaluated. In situ low-strain shear wave velocity determinations have been performed on a number of existing zoned earthfill dams and an earth dam under construction. These field measurements of shear wave velocity by geophysical exploration methods have become an integral part and standard procedure at the Bureau for obtaining input parameters for dynamic analyses of earth dams. In the course of shear wave velocity measurements, various borehole methods, such as downhole, crosshole, and uphole, as well as seismic refraction have been used. Shear wave velocity measurements have been performed with explosive and nonexplosive impulsive energy sources using cased and uncased test holes. The results of these field studies have not only provided input parameters for dynamic analyses, but have also provided information as to which method or combination of methods should be used to obtain optimum results. Test methods and results of the various in situ measurements are compared and evaluated.
Evaluation of In Situ Shear Wave Velocity Measurement Techniques
A. Viksne (Autor:in)
1976
44 pages
Report
Keine Angabe
Englisch
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