| Issue |
E3S Web of Conf.
Volume 544, 2024
8th International Symposium on Deformation Characteristics of Geomaterials (IS-Porto 2023)
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 6 | |
| Section | Experimental Investigations From Very Small Strains to Beyond Failure - Advances in Laboratory Testing Techniques (Equipment and Procedures) | |
| DOI | https://doi.org/10.1051/e3sconf/202454401002 | |
| Published online | 02 July 2024 | |
A simplified cyclic shear test for pore water pressure build-up of different soils
1 Technische Universität Dresden, Institute of Geotechnical Engineering, 01062 Dresden, Germany
2 Technische Universität Dresden, Institute of Geotechnical Engineering
* Corresponding author: bozana.bacic@tu-dresden.de
Pore water pressure (PWP) build-up essentially takes place in loose, water saturated, coarse-grained soils causing the reduction of effective stresses and soil stiffness (soil liquefaction). Considering the same internal structure (soil fabric), stress level, loading amplitude etc. the response of different soils to external disturbance is different. Therefore, the increase of PWP or tendency to soil liquefaction is dependent on the granulometric properties of soils. This paper reveals a simple cyclic shear test that enables the comparison of the sensitivity of PWP build-up to density changes for different sands. The presented test allows a fast installation of a soil specimen and a subsequent constant volume cyclic shearing within a short time period (ca. 30 minutes). The results successfully confirm the repeatability of the method as well as the dependence of the PWP build-up on the initial relative density and saturation degree. It is also shown that the soil fabric has an essential influence on the build-up of PWP. The method aims to allocate an index value to every tested sand and thus to quantify a sensitivity of different sands to density changes with respect to liquefaction.
Key words: cyclic shear test / liquefaction / index value / soil fabric
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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