Comparison between deformation modulus of rock mass measured by plate jacking and dilatometer tests

• Autorzy: Rezaei M. , Chafoori M. , Ajalloeian R.
• Języki publikacji: EN

Abstrakty

EN

Comparison between deformation modulus of rock mass measured by plate jacking and dilatometer tests. For determination of the in-situ deformation modulus of rock mass at Bakhtiari Dam site, located in south-west of Iran, plate jacking tests (PJT) and dilatometer tests (DLT) carried out during the geotechnical investigations. In this study, the results of PJTs and DLTs were compared. This comparison involves 89 vertical and horizontal PJTs and 83 DLTs carried out in 6 rock units of Sarvak formation. Although, both PJTs and DLTs in the Bakhtiari Dam site were performed in same geological and geotechnical conditions, but there are not sufficient side by side data to make a paired two samples correlation. Therefore, the mean of in-situ data was compared at each rock unit. Besides Mann–Whitney U tests were performed to compare in-situ test results. The comparison shows that the deformation modulus measured by both methods has no significant differences. However, in low quality rock masses the moduli measured by the use of DLTs were greater than the modulus measured by PJTs. Conversely, in high quality rock masses the results of PJTs were greater than DLT’s.

Słowa kluczowe

EN

comparative analysis; deformation modulus; rock mass; measurement; plate jacking test; dilatometer test; geotechnics

• Wydawca: -
• Czasopismo: Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska
• Rocznik: 2017
• Tom: 26
• Numer: 3[77]
• Opis fizyczny: p.317-325,fig.,ref.

Twórcy

autor

Rezaei M.

• Ferdowsi University of Mashhad, 9177948974 Azadi Square, Mashhad, Iran

autor

Chafoori M.

• Ferdowsi University of Mashhad, 9177948974 Azadi Square, Mashhad, Iran

autor

Ajalloeian R.

• University of Isfahan, Isfahan, Iran

Bibliografia

• Agharazi, A., Tannant, D.D. & Derek Martin, C. (2012). Characterizing rock mass deformation mechanisms during plate load tests at the Bakhtiary dam project. International Journal of Rock Mechanics and Mining Sciences, 49, 1-11. 10.1016/j.ijrmms.2011.10.002.
• Aliasghari, H. & Ahadi, B. (2007). Effect of Anisotropy on Rock Mass Deformation Modulus in Javeh Dam Site. Proceedings of 11th ACUUS Conference: Underground Space: Expanding the Frontiers. Athens, Greece, 469-473.
• ASTM (2008). Standard Test Method for Determining the in Situ Modulus of Deformation of Rock Mass Using the Rigid Plate Loading Method. D 4394-08.
• Galera, J.M., Alvarez, M. & Bieniawski, Z.T. (2007). Evaluation of the deformation modulus of rock masses using RMR Comparison with dilatometer tests, Underground Works under Special Conditions: Madrid.
• Hoek, E. & Diederichs, M.S. (2006). Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 43, 203-215.
• Isik, N.S., Doyuran, V. & Ulusay, R. (2008). Assessment of deformation modulus of weak rock masses from pressuremeter tests and seismic surveys. Bulletin of Engineering Geology and Environment, 6, 293-304. 10.1007/s10064-008-0163-0.
• ISRM (1979). Suggested methods for determining in-situ deformability of rock- Part I: Suggested method for deformability determination using a plate test. International Journal of Rock Mechanics Mining Sciences and Geomechanics, 16, 197-202.
• ISRM (1989). ISRM suggested method, rock characterization, testing and monitoring. London: Pergamon.
• Kavur, B., Štambuk Cvitanović, N. & Hrženjak, P. (2015). Comparison between plate jacking and large flat jack test results of rock mass deformation modulus. International Journal of Rock Mechanics and Mining Sciences, 73, 102-114. 10.1016/j.ijrmms.
• Ladanyi, B. (1987). ISRM Testing Methods – Suggested Methods for Deformability Determination Using a Flexible Dilatometer. International Journal of Rock Mechanics Mining Sciences and Geomechanics, 24(2), 123-134.
• Mann, H.B. & Whitney, D.R. (1974). On a test of whether one of two random variables is stochastically larger than the other. Annals of Mathematical Statistics, 18(1), 50-60. 10.1214/aoms/1177730491.
• Palmstrom, A. & Singh, R. (2001). The deformation modulus of rock masses – comparisons between in situ tests and indirect estimates. Tunnelling and Underground Space Technology, 16(3), 115-131.
• USBR (2009). Determining Situ Deformation Modulus Using a Flexible Volumetric Dilatometer. 6575-09.

Identyfikatory

DOI

10.22630/PNIKS.2017.26.3.31