Regression Analysis between Lugeon and Vs in Pulur Metamorphic Rock Masses

In the determination of the permeability of rock masses, apart from on-site experiments, few experimental relationships have been established for the determination of this parameter due to the very complex geotechnical and geophysical properties that control permeability. In this study, simple regression analyzes were made by comparing S wave velocity (Vs) and Lugeon (LU) values, which are engineering parameters affecting permeability, and experimental equation was obtained for the permeability of rock mass. Then, with the help of the obtained limit values, zoning sections varying with the depth of the study area were created and the permeability of the rock mass was evaluated. While performing simple regression analysis, the highest correlation coefficient (r = 0.67) obtained in the equation between LU and S wave velocity was obtained in the logarithmic equation, and it was found that the relationship between the variables showed a good and negative correlation. As a result, when the S wave velocity values of the metamorphic at the dam axis are examined, it is determined that the rock mass at values varying between 975-1115 m/s is impermeable, while the mass with S wave velocity change between 582-973 m/s is very permeable. The low permeability and high S wave velocity values indicate that the discontinuities in the rock mass do not contain fillings.

Anahtar Kelimeler: S-wave velocity, Lugeon, Regression

In the determination of the permeability of rock masses, apart from on-site experiments, few experimental relationships have been established for the determination of this parameter due to the very complex geotechnical and geophysical properties that control permeability. In this study, simple regression analyzes were made by comparing S wave velocity (Vs) and Lugeon (LU) values, which are engineering parameters affecting permeability, and experimental equation was obtained for the permeability of rock mass. Then, with the help of the obtained limit values, zoning sections varying with the depth of the study area were created and the permeability of the rock mass was evaluated. While performing simple regression analysis, the highest correlation coefficient (r = 0.67) obtained in the equation between LU and S wave velocity was obtained in the logarithmic equation, and it was found that the relationship between the variables showed a good and negative correlation. As a result, when the S wave velocity values of the metamorphic at the dam axis are examined, it is determined that the rock mass at values varying between 975-1115 m/s is impermeable, while the mass with S wave velocity change between 582-973 m/s is very permeable. The low permeability and high S wave velocity values indicate that the discontinuities in the rock mass do not contain fillings.

Keywords: S-wave velocity, Lugeon, Regression

Sarı, M. & Alemdağ, S. (2020). Regression Analysis between Lugeon and Vs in Pulur Metamorphic Rock Masses. Journal of Current Research on Engineering, Science and Technology, 6 (2), 103-110.