Abstract
The traditional way of designing foundations is based on a single representative strength and deformation parameters. Often the strength properties are derived from triaxial testing. A triaxial test using samples with slenderness ratio H/D = 1 and smooth ends is found to be more reliable by several studies in the literature. Despite of that, the majority of triaxial tests are conducted with the traditional H/D = 2 ratio and rough ends. There are consequences in choosing to use the set-up with H/D=1 and smooth ends or the traditional one. This paper shows that the settlements of a rigid footing can be up to six times higher when the design uses deformation properties of a triaxial test run with H/D = 1 and smooth ends. This is due to a much lower secant stiffness than the one resulting from test with H/D = 2. Depending on the interpretation and way of conducting the test, the bearing capacity of a strip footing calculated by using properties from the H/D = 2 ratio and rough ends set-up can be almost two times greater than the one returned by the set-up with H/D=1 and smooth ends.
Original language | English |
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Title of host publication | Proceedings, 7th International Symposium on Geotechnical Safety and Risk (ISGSR 2019) : State-of-the-Practice in Geotechnical Safety and Risk |
Publisher | Research Publishing |
Publication date | 2019 |
Pages | 370-375 |
ISBN (Electronic) | 978-981-11-2725-0 |
DOIs | |
Publication status | Published - 2019 |
Event | 7th International Symposium on Geotechnical Safety and Risk - National Taiwan University of Science and Technology, Taipei, Taiwan, Province of China Duration: 11 Dec 2019 → 13 Dec 2019 Conference number: 7 http://www.isgsr2019.org/ |
Conference
Conference | 7th International Symposium on Geotechnical Safety and Risk |
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Number | 7 |
Location | National Taiwan University of Science and Technology |
Country/Territory | Taiwan, Province of China |
City | Taipei |
Period | 11/12/2019 → 13/12/2019 |
Internet address |
Keywords
- Triaxial test
- friction angle
- stiffness modulus
- smooth/rough ends
- H/D ratio
- sand