Assessment of deformation modulus of weak rock masses from pressuremeter tests and seismic surveys

Date

2008-08-01

Author

IŞIK, Nihat Sinan
Doyuran, Vedat
ULUSAY, REŞAT

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The deformation modulus of intact rock can be determined through standardized laboratory tests for heavily jointed rock masses but this is very difficult, while in situ tests are time-consuming and expensive. In this study, the deformation modulus of selected heavily jointed, sheared and/or blocky, weathered, weak greywacke, andesite and claystone were assessed, based on pressuremeter tests, geo-engineering characterization and seismic surveys. Empirical equations based on GSI and RMR values are proposed to indirectly estimate the deformation modulus of the greywackes. For the andesites, the spacing of the discontinuities is greater than the length of the pressuremeter probe hence the intact rather than rock mass deformation modulus is obtained. The pressuremeter test results from the claystones could not be correlated with the field data; the relationship between the ratio of rock mass modulus to intact rock modulus and RQD appears to give a better estimation of the deformation modulus.

Subject Keywords

Geotechnical Engineering and Engineering Geology, General Engineering, General Earth and Planetary Sciences, Ocean Engineering, General Environmental Science, Greywacke, Andesite, Claystone, Pressuremeter test, Rock mass, Shear wave

URI

https://hdl.handle.net/11511/66716

Journal

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

DOI

https://doi.org/10.1007/s10064-008-0163-0

Collections

Department of Geological Engineering, Article

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Citation Formats

N. S. IŞIK, V. Doyuran, and R. ULUSAY, “Assessment of deformation modulus of weak rock masses from pressuremeter tests and seismic surveys,” BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, pp. 293–304, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66716.