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- Laue, J., et al.
(author)
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15 years of experience using a physical model exercise in a Masters' course
- 2014
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In: Physical modelling in geotechnics. - Leiden : CRC Press/Balkema. - 9781138022218 ; , s. 445-450
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Conference paper (peer-reviewed)abstract
- Modelling in Geotechnics' has been taught for two hours over 14 weeks in the 2nd, and later 3rd, semester of the Masters' studies at ETH Zurich. In addition to a series of frontal lectures on modelling techniques, as well as for their application to various boundary value problems, this course contains an exercise that compares 3 ways of modelling a practical case. Students are invited to investigate a common boundary value problem through complementary analytical, physical and numerical (finite element) modelling. A suitable boundary value problem, such as for shallow foundations or slopes, is selected to ensure that the exercise can be conducted in the limited time available for the students, and that the physical model takes only a finite amount of time so that all students can witness a test from start to finish. A comparison allows the assumptions made for the various models or calculations to be discussed and trains the students to put the different results into perspective. Practical aspects such as feasibility and timing, as well as applicability to reaching the learning goal of the class, will be reviewed. © 2010 Taylor & Francis Group, London.
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| 3. |
- Gautray, J., et al.
(author)
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Investigation of the spatial distribution of installation effects around stone columns with an electrical needle
- 2014
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In: Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014. - 9781138022218 ; , s. 289-294
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Conference paper (peer-reviewed)abstract
- Stone columns provide valuable ground improvement in soft soils in numerous projects around the world. They increase the stiffness of the subsoil and reduce time needed for consolidation. This last aspect is due to the fact that the main drainage direction switches from being vertical to being radial, significantly reducing the length of the drainage path. However, driving the installation mandrel into the ground causes changes in the structure of the subsoil, usually referred to as smear zones, which decrease the drainage performance of granular inclusions. The implementation of a needle to measure the impedance (electrical resistivity) in-flight in the geotechnical centrifuge at ETH Zürich enables an insight to be made into the pore size distribution with depth close to a stone column constructed in-flight. © 2010 Taylor & Francis Group, London.
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