Coupled hydro-mechanical modeling in unsaturated soils with applications in hillslope processes
Abstract/Contents
- Abstract
- Coupled hydro-mechanical problems involving unsaturated soil conditions have been investigated broadly in geotechnical and geo-environmental engineering. Focusing on hillslope processes, this thesis develops a time-adaptive numerical method for simulating the interactions between fluid and solid in geomaterials. The thesis is divided into two parts, namely, modeling and application. For the modeling part, a system of finite element equations based on porous media theory and two constitutive assumptions is presented. Unsaturated flow in deformable media gives rise to a stiff problem emanating from the nonlinearity in the constitutive relations and the Neumann boundary conditions in the fluid flow. To address this issue, a time-adaptive method is introduced. In addition, previous efforts to improve the efficiency of the computational modeling scheme are summarized. For the application part, a well documented case of hillslope process involving heavy rainfall that resulted in slope stability failure is analyzed. Using two-dimensional modeling, the proposed continuum hydro-mechanical is used to quantify the stress and pore pressure fields in this slope, which are then used to conduct limit equilibrium analyses. Subsequently, three-dimensional continuum modeling is conducted to highlight the multiphysical processes responsible for the failure of this slope.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2011 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Liu, Xiaoyu |
|---|---|
| Associated with | Stanford University, Civil & Environmental Engineering Department |
| Advisor | Borja, Ronaldo Israel |
| Thesis advisor | Borja, Ronaldo Israel |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Xiaoyu Liu. |
|---|---|
| Note | Submitted to the Department of Civil and Environmental Engineering. |
| Thesis | Thesis (Engineering)--Stanford University, 2011. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2011 by Xiaoyu Liu
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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