- 9 M 12 M Iv 2h Embankment Fill Stiff Clay Completely Weathered Rock 12 M 50 M Undrained Parameters Drained Parameters Cu 1 (58.79 KiB) Viewed 22 times
Note *Undrained parameters are not applicable to embankment fill and completely weathered rock materials as they are not subjected to undrained loading or unloading To input the undrained parameters of the stiff clay (in the student version of the software), select the Mohr-Coulomb material model and set cohesion -40 kPa and phi=0. Name: Stiff clay Slope Stability Material Model: Mohr-Coulomb Basic Unit Weight: Cohesion': 18 kN/m³ 40 kPa Phi: 0° Project Brief Figure above, shows a proposed cutting into existing ground, to form an embankment slope. The vertical height of the embankment is 9 m. The natural ground water table is located at 1 m below the ground surface. The embankment needs to be analysed for following cases: ✓ Short term conditions (using undrained parameters for stiff clay) ✔ Long term conditions (using drain parameters for stiff clay) ✓ Rapid draw down (water table at a height of H/3 of the embankment, H= height of the embankment, use undrain parameters for stiff clay) Carry out following design activities to complete your design. 01. Determine the factor of safety of the slope under the above three cases, using Entry and Exit method 02. Determine the factor of safety of the slope under the above three cases, using Grid and Radius method
Write a concise report addressing questions 1 to 4 above. In your report, show the FoS and failure slope obtained from Slope/W software for each analysis. You can use screen captures. Design report content You need to include following information in your report. 1. Write a brief introduction to your project. 2. Show the slope/W model with the ground profile and water table (screen captures). 3. For exit and entry method, show the exit and entry regions you specified in your model. For grid and radius method, show the specified grid and radius range. 4. Show the critical FoS values and Failure surfaces obtained, using the two methods. 5. If the results from the two different methods are different, discuss the reasons for the difference 6. What are the methods that can be used to avoid the local failures in the embankment?