An investigation of stress-strain characteristics of soft Bangkok clay using a fully automated triaxial apparatus | |
| Author | Yamamoto, Nobutaka |
| Call Number | AIT Thesis no.GE-98-31 |
| Subject(s) | Strains and stresses Clay--Thailand--Bangkok--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Undrained triaxial monotonic loading tests with several unload-reload cycles at different strain level were carried out on soft clay samples collected from sutthisan site, Bangkok, as to characterize the pseudo-elastic Young's modulus, Emax as well as the pseudo-elastic Young's modulus dependent on stress-level, (Emax)q and undrained shear strength, Su of Bangkok subsoil. The Emax was determined by using a fully automated triaxial apparatus, which developed at Hokkaido University and donated Asian Institute of Technology by Government of Japan. Pseudo-elastic modulus depended only on the current magnitude of void ratio and effective stress. In an attempt to formulize, therefore, Emax measured in laboratory could be expressed simply form. The depth profiles predicted Gmax obtained from Emax in triaxial was, however, shown slightly underestimate of Gmax for all depth compared to Gr. (Emax)q exhibited non-linear deformation against mean effective stress so that it was difficult to express the exponential relation. The aging effect of Bangkok clay is reduced due to recent consolidation by water pumping. This characteristic could be examined by using the metastability index. The shear strength could also be predicted by using MILK (Metastability Index coupled with Laboratory Ko test) method, which may be able to estimate the actual undrained shear strength in the ground. |
| Year | 1999 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Balasubramaniam, A. S.;Shibuya, S.; |
| Examination Committee(s) | D. G., Lin;Seah, T. H.; |
| Scholarship Donor(s) | KEIDANREN (Japan) ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |