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Estimation of rock mass modulus

✍ Scribed by Chen-Haw Lee; Shin-Tsu Chen

Publisher
Springer-Verlag
Year
1989
Tongue
English
Weight
356 KB
Volume
7
Category
Article
ISSN
1573-1529

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Estimating the deformation modulus of rock masses: a comparative study
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Although the modulus of deformation of rock masses has crucial importance for geotechnical projects, such as tunnels and dams, the determination of this parameter by in situ tests requires considerable costs and involves difficult operational processes. For this reason, empirical equations for the i

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## Ε½ . Three methods of in situ deformation modulus Em measurements of rock masses have been described, analysed and Ε½ . compared. The plate jacking PJT test, where the deformations are measured by extensometers in drill holes, gives generally the best results. A factor of 2.5 has been found betwee