Deformation analysis of deep excavation in Bangkok subsoils | |
| Author | Twarath Sutabutr. |
| Call Number | AIT Thesis no. GT-91-14 |
| Subject(s) | Soil mechanics--Thailand--Bangkok Deformations (Mechanics) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-91-14 |
| Abstract | The magnitude of the deformations around an excavations is an important criterion in the design of the support system of the excavation. In this study, the deformation behavior of excavations with different support system are analyzed numerically using the Finite Element Method ( FEM ) of analysis. A total of six excavations in Bangkok were analyzed. Based on the analysis, the merits and the demerits of each type of excavation support system used is discussed and the most efficient method of excavation for Bangkok is recommended. The different elements of the excavation support system, namely, the support wall, the steel strut support, the concrete floor slab, the foundation piles and the interface behavior are each modeled separately. The CRISP computer program, which possesses incorporated constitutive models, is· used in the analysis. The excavation is simulated by unloading via removing respective finite elements over the incremental load steps. Modified Cam-Clay model is used as the constitutive law for soft clays. The predicted deformations for each stage of excavation is compared with field observations. In addition, parametric studies are conducted on the effect of surcharge, the strut preloading patterns, the foundation piles installed prior to excavation and the installation of Barrette piles in order to establish efficient excavation techniques. Finally, sensitivity analyses on the effect of flexural stiffness and the embedment length of the wall are also presented to establish guidelines for excavations. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-91-14 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Balasubramaniam, A.S.; |
| Examination Committee(s) | Noppadol Phien-wej;Honjo, Yusuke;Tian Ho Seah; |
| Scholarship Donor(s) | The government of Australia; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology |