In this thesis, hypothetical cases of in-situ walls, that are supported at one, two and
four levels, as well as cantilever walls, are analyzed using plane strain and 3D
finite element programs. A parametric study is performed by varying the soil
stiffness. Deflection, moment, anchor loads and effective lateral earth pressures
acting on the walls are examined to understand corner effect. Comparisons are
made between plane strain and 3D without corner analysis results to confirm that
two programs yield similar results. Moreover, two deep excavation case histories
namely: i) Ankara Ç / ankaya trade center and residence and, ii) Ekol construction
are analyzed using calibrated models. Calibrations of the models are made using
inclinometer data.
In hypothetical models, it is found that corner effects on deflections diminish after
20m distance from the corner for excavations that are 8m and 12m deep. Corner
effects on deflection decrease as elastic modulus of soil or stiffness of the system
increase. Moment diagram pattern changes along the excavation side in cantilever
case study. Moment diagram obtained around a corner in 3D analysis and
diagrams obtained from the plane strain analyses by modeling the corner as a strut
are quite similar. The anchor loads increase until 10-15m distance from the corner.
After this distance they become nearly constant.
In the analysis of case histories, a trial error solution is adopted to fit the deformed
shape of piled wall obtained from 3D analysis to the deformations recorded by
inclinometers. These results are compared with the results of plane strain
analyses. Ankara-Ç / ankaya project is solved by modeling the corner as strut in
plane strain analyses. Results of this analyze agrees with field monitoring data,
indicating that corner effects could be simulated by modeling the perpendicular pile
wall as a strut in plane strain analysis.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12610153/index.pdf |
| Date | 01 December 2008 |
| Creators | Unlu, Guliz |
| Contributors | Erol, Orhan |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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