Assignment
Numerical Analysis
ENEC20003 Term 2 2019
Numerical Simulation Project:
Simulate a Fixed-ring consolidation test on a clay sample for bath loading and unloading stages using Geostudio Sigma/W package. Assume the following.
Sample diameter: 75mm
Sample Height: 20mm
Bulk Unit weight of the sample: 19 kN/m3
Cohesion: 40kPa
Internal Friction angle: 24
Dilation angle: 0
Module of Elasticity (E): 10MPa
Poisson Ratio: 0.334
Permeability in the satursted condition: 1E-12m/sec
Loading stages: Day 1: 12.5 kPa, Day 2: 25, Day 3: 50kPa, Day 4: 100 kPa, Day 5: 200 kPa
Unloading stages: Day 6: 100 kPa, Day 7: 50 kPa, Day 8: 25 kPa
If you require more parameter, assume a reasonable value and state it in your solution.
Time (day) | Applied Surcharge stress (kPa) |
0 (in situ analysis) | 0 |
1 | 12.5 |
2 | 25 |
3 | 50 |
4 | 100 |
5 | 200 |
6 | 100 |
7 | 50 |
8 | 25 |
Use the following hydraulic conductivity and volumetric water content functions:
Hints
Please note that there will be two porous stones at the top and bottom of the sample for providing drainage to the sample.
Therefore, you should add a hydraulic boundary condition of (zero pore-water pressure) to both the top and bottom of the sample.
Note: Make reasonable assumptions if needed and state your assumptions clearly in your report.
Task:
Model the above problem using Geostudio 2018 and Prepare a report with the following components:
The report must be submitted in the current MS Word file including the answers to the above questions. You should also upload your GeoStudio into a Google drive and add the link to the report.
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