Evaluation of soil constitutive model on braced excavation support behaviour
For this project, a two dimensional finite element analysis using PLAXIS was conducted to evaluate the performances of two types of soil stress-strain model, namely, Mohr-Coulomb model and the Hardening Soil model for excavations in clay. The results from these two models were compared in regards to...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2013
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/52718 |
| _version_ | 1826126445258211328 |
|---|---|
| author | Sim, Zhi Hui. |
| author2 | Goh Teck Chee, Anthony |
| author_facet | Goh Teck Chee, Anthony Sim, Zhi Hui. |
| author_sort | Sim, Zhi Hui. |
| collection | NTU |
| description | For this project, a two dimensional finite element analysis using PLAXIS was conducted to evaluate the performances of two types of soil stress-strain model, namely, Mohr-Coulomb model and the Hardening Soil model for excavations in clay. The results from these two models were compared in regards to the best fit E_u/C_u ratio, maximum wall deflection, ground settlement and strut forces. The best fit E_u/C_u ratio was plotted against various parameters such as Plasticity Index (PI), Undrained Shear Strength (Cu), Factor of Safety (Fs) as well as (Cu/(σ_v^' )) to obtain correlations. A total of seven case studies with complete soil data were used for analysis.
In order to obtain the best fit E_u/C_u ratio for both the Mohr-Coulomb model and the Hardening Soil model, models were created by varying the Eu values from the available Cu data. The best fit E_u/C_u ratio model would have the one with the closest fit with the actual measured wall deflection.
The results show that using the Mohr-Coulomb model for excavation analysis in clay tend to produce higher values for the best fit E_u/C_u ratio. Also, using the Mohr-Coulomb model tends to produce smaller initial settlement but larger final settlement. In addition, using the Mohr-Coulomb model tends to produce 10~30% more strut forces than using the Hardening Soil model. Lastly, there is a downward sloping trend when the best fit E_u/C_u ratio is plotted against (Cu/(σ_v^' )). |
| first_indexed | 2024-10-01T06:52:46Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/52718 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:52:46Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/527182023-03-03T17:11:01Z Evaluation of soil constitutive model on braced excavation support behaviour Sim, Zhi Hui. Goh Teck Chee, Anthony School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical For this project, a two dimensional finite element analysis using PLAXIS was conducted to evaluate the performances of two types of soil stress-strain model, namely, Mohr-Coulomb model and the Hardening Soil model for excavations in clay. The results from these two models were compared in regards to the best fit E_u/C_u ratio, maximum wall deflection, ground settlement and strut forces. The best fit E_u/C_u ratio was plotted against various parameters such as Plasticity Index (PI), Undrained Shear Strength (Cu), Factor of Safety (Fs) as well as (Cu/(σ_v^' )) to obtain correlations. A total of seven case studies with complete soil data were used for analysis. In order to obtain the best fit E_u/C_u ratio for both the Mohr-Coulomb model and the Hardening Soil model, models were created by varying the Eu values from the available Cu data. The best fit E_u/C_u ratio model would have the one with the closest fit with the actual measured wall deflection. The results show that using the Mohr-Coulomb model for excavation analysis in clay tend to produce higher values for the best fit E_u/C_u ratio. Also, using the Mohr-Coulomb model tends to produce smaller initial settlement but larger final settlement. In addition, using the Mohr-Coulomb model tends to produce 10~30% more strut forces than using the Hardening Soil model. Lastly, there is a downward sloping trend when the best fit E_u/C_u ratio is plotted against (Cu/(σ_v^' )). Bachelor of Engineering 2013-05-23T02:51:37Z 2013-05-23T02:51:37Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/52718 en Nanyang Technological University 52 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Geotechnical Sim, Zhi Hui. Evaluation of soil constitutive model on braced excavation support behaviour |
| title | Evaluation of soil constitutive model on braced excavation support behaviour |
| title_full | Evaluation of soil constitutive model on braced excavation support behaviour |
| title_fullStr | Evaluation of soil constitutive model on braced excavation support behaviour |
| title_full_unstemmed | Evaluation of soil constitutive model on braced excavation support behaviour |
| title_short | Evaluation of soil constitutive model on braced excavation support behaviour |
| title_sort | evaluation of soil constitutive model on braced excavation support behaviour |
| topic | DRNTU::Engineering::Civil engineering::Geotechnical |
| url | http://hdl.handle.net/10356/52718 |
| work_keys_str_mv | AT simzhihui evaluationofsoilconstitutivemodelonbracedexcavationsupportbehaviour |