Pore water pressure evolution and grain shape of different materials
References to related material | https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-945638 | |
Type of the data | Dataset | |
Total size of the dataset | 3074577741 | |
Author | Bacic, Bozana | |
Upload date | 2025-01-27T15:30:14Z | |
Publication date | 2025-01-27T15:30:14Z | |
Data of data creation | 2023 | |
Publication date | 2025-01-27 | |
Abstract of the dataset | These data serve as a basis for comparing the evolution of excess pore water pressure in different materials (natural sands, mixtures of glass beads and crushed sand), as well as various influencing factors and specimen preparation methods, obtained using the newly developed simplified undrained cyclic shear test, the PWP Tester. Additionally, the data for the determination of grain shape parameters of several materials are included. These files support the publication: https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-945638. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/1256 | |
Public reference to this page | https://doi.org/10.25532/OPARA-733 | |
Publisher | Technische Universität Dresden | |
Licence | Attribution-NonCommercial-NoDerivatives 4.0 International | en |
URI of the licence text | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
Specification of the discipline(s) | 4::43 | |
Title of the dataset | Pore water pressure evolution and grain shape of different materials | |
Project abstract | DFG project number: 316451575 (HE 2933/10-1, HE 2933/10-2 and WI 3180/6-2): The build-up of excess pore water pressure (PWP) usually takes place in loose, saturated, coarse-grained soils when subjected to external shear loading (monotonic or cyclic) under prevented water drainage. When the amount of the excess PWP reaches the value of the total stress, the grain structure collapses and the shear strength and stiffness of the soil disappear - the soil behaves as a liquid. Such soil phenomenon is commonly referred to as soil liquefaction. Experimental laboratory testing of the excess PWP build-up in coarse-grained soils is almost restricted to sophisticated undrained cyclic triaxial and simple shear tests. A novel experimental method, the PWP Tester, enabling a simple and fast testing of the excess PWP accumulation in coarse-grained soils has been designed within this project. The method provides rapid and reproducible measurements, with each test lasting approximately 30 minutes. During testing, excess PWP evolution is measured under undrained conditions during cyclic shearing of a saturated and consolidated cylindrical sand specimen. Results indicate that higher soil density and consolidation pressure, along with lower shear amplitudes, reduce excess PWP generation, confirming the method’s reliability. Validation was further achieved by comparing results from the PWP Tester with those from undrained cyclic triaxial tests performed on different sands. Specimens in the PWP Tester were prepared through water sedimentation, resulting in a similar initial soil fabric across different sands, as confirmed by µCT imaging. Despite significant variations in relative density resulting from sand sedimentation under water, the rate of excess PWP build-up remained similar across different sands. This suggests that soil fabric has an equal or even greater influence on excess PWP accumulation than relative density. The PWP Tester’s straightforward and time-efficient procedure, combined with its reliable results, highlights its potential as an effective index test for assessing the tendency of soils to generate excess PWP. | |
Project title | DFG Project - Beurteilung der Verflüssigungsneigung grobkörniger Böden anhand eines Identifikationsversuchs |
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