A simple method for the determination of sensitivity to density changes in sand liquefaction
Open Geomechanics, Volume 2 (2020), article no. 3, 8 p.

Fully saturated loose coarse-grained soils are known to be prone to liquefaction. Conventional laboratory tests for soil liquefaction include usually cyclic testing in triaxial apparatus. However, such investigations are complicated and time-consuming. The objective of the outlined work is to evaluate the sensitivity of different sands to density change with respect to liquefaction using a relatively simple method. This method enables a fast setup of the tested specimen and a subsequent investigation of the pore water pressure build-up during cyclic shearing within a short time. The results have confirmed a good repeatability of the new method as well as an expected dependence of the pore pressure build-up on initial density. Validation of the method was performed using the results of cyclic triaxial tests. A good agreement between both methods was observed regarding the rate of the pore pressure increase with initial density. Furthermore, it was shown that the initial fabric of soil has a larger impact on the pore pressure build-up during cyclic loading than the relative density.

Received:
Revised:
Accepted:
Published online:
DOI: 10.5802/ogeo.6
Keywords: Liquefaction, laboratory tests, cyclic shear test, cyclic triaxial test, soil fabric
Bacic, Bozana 1; Herle, Ivo 2

1 Institute of Geotechnical Engineering, TU Dresden 01062 Dresden, Germany
2 Institute of Geotechnical Engineering, TU Dresden
License: CC-BY-NC-SA 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights
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Bacic, Bozana; Herle, Ivo. A simple method for the determination of sensitivity to density changes in sand liquefaction. Open Geomechanics, Volume 2 (2020), article  no. 3, 8 p. doi : 10.5802/ogeo.6. https://opengeomechanics.centre-mersenne.org/articles/10.5802/ogeo.6/

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